CSE HTML Validator Std/Pro v5.51/Lite v3.50 Documentation
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Configuration File

HTML Validator comes with an included configuration file that supports many different 'categories' of tags. Support for HTML 4.01, HTML 4.0, Netscape Extensions, Microsoft Internet Explorer extensions, Cold Fusion/CFML, SMIL, RealText, WML, XHTML and more is already included. Note that some categories such as Cold Fusion/CFML, SMIL, RealText, and WML are only supported by the professional and standard editions.

An important characteristic of the included configuration file is that the categories of HTML are built upon one another. This means that if you want to validate against HTML 3.2, you must also make the category HTML 2.0 active, in addition to making the category HTML 3.2 active. If you want to validate against HTML 4.0, you must make the categories HTML 2.0, HTML 3.2, and HTML 4.0 active. You cannot make just the category HTML 4.0 active. This is because the category HTML 4.0 requires the category HTML 3.2 as its "foundation", and the category HTML 3.2 requires the category HTML 2.0 as its "foundation" .

To validate for Microsoft Internet Explorer (Microsoft IE), you will also need to make the categories HTML 2.0, HTML 3.2, and (for Internet Explorer 4.0 only) HTML 4.0 active as well as the category for the Microsoft IE Extensions you wish to use (either 3.0 or 4.0). If you make the Microsoft IE 4.0 Extensions category active, you must also make the Microsoft IE 3.0 Extensions category active.

A similar situation applies for Netscape Extensions. You will have to select the Netscape Extension category that you wish to validate against, as well as HTML 2.0, HTML 3.2, and other "foundation" categories that Netscape supports.

The WebTV category requires at least the HTML, Microsoft IE Extensions, Netscape Extensions, and Tables categories active for full support.

The SMIL category only requires the Element Identifiers category active if you will use the ID attribute. Other categories may be deactivated. The tag name program for the SMIL tag automatically disables most categories, so you don't have to disable any categories for SMIL syntax checking.

The default is for most categories to be active. If needed, categories that are not active may automatically be made active by a tag name program. Therefore, depending on how a specific category works, a non-active category may still allow syntax checking of that category even if it is inactive.

Notes

  • The Dynamic HTML and Scripting & Applets categories should normally be made active or inactive together.
  • The Obsolete category contains tags such as LISTING, NOTE, PLAINTEXT and XMP.
  • The Miscellaneous category contains tags such as NEXTID, and the MSIMAGELIST, NATURALSIZEFLAG, NOF, NOSAVE, xmnls:o, and xmnls:v attributes.
  • The General category contains the CSEIGNORE tag. Use the CSEIGNORE tag to surround tags that you want HTML Validator to ignore during a validation.
  • The XML 1.0 category contains the xml:lang attribute.

Lite Version

CSE HTML Validator Lite does not support all of the categories that the professional version supports (such as CFML, RealText, SMIL, WebTV, and XHTML). Furthermore, it does not support tag names programs, one of the most powerful features of the professional version. Because it does not support tag name programs, the following information about the validator flags does not apply to the lite version. The lite version will never generate any of the messages that you see below.

Validator Flags (Pro, Std, Lite)

The tag name programs in the included configuration file may act differently depending on what validator flags are set. This allows you to further customize the behavior and validation of HTML Validator. Listed below are the effects that having certain flags set will cause to documents being validated with the included configuration file. Setting a flag usually causes certain messages, warnings, and/or errors to be enabled for display. Most of these messages, warnings, and errors begin with "[x]" where x is the validator flag that can be unchecked or checked in order to disable or enable the message, respectively. This lets you easily determine which flag you need to disable if you see a message that you do not want to be displayed during a validation. However, remember that when you disable a flag, you may be disabling multiple messages. Therefore, to determine most or all of the effects of disabling a specific flag, you can use the following information.

Note that flags that are not listed are probably not used, depending on what configuration file you are using. Flags not listed will likely be used in future configuration files. If you are using a newer configuration file, then some flags may be used that are not documented here. If you are using an older configuration file, then some flags documented may not be actually used. The effects of some flags may also differ according to the version of HTML Validator that you are using. For example, flag 14 has no effect for versions prior to 3.9.

Flag 1 (Internet Explorer specific messages)
  • If a user interface color name is used for a color attribute value, displays a message that it is Internet Explorer 4.0+ specific. (New 20020821)
  • If the AUTOCOMPLETE attribute is used, displays a message that it is Internet Explorer 4.0+ specific. (New 20000925)
  • If the CONTENTEDITABLE attribute is used, displays a message that it is Internet Explorer 5.5+ specific. (New 20020801)
  • If the HIDEFOCUS attribute is used, displays a message that it is Internet Explorer 5.5+ specific. (New 20020801)
  • If the ONAFTERPRINT or ONBEFOREPRINT event attribute is used, displays a message that it is Internet Explorer 5.0+ specific. (New 20020709)
  • If the ONBEFORECOPY, ONBEFORECUT, ONBEFOREPASTE, ONCOPY, ONCUT, or ONPASTE event attribute is used, displays a message that it is Internet Explorer 5.0+ specific. (New 20020710)
  • If the ONDRAGSTART or ONSELECTSTART event attribute is used, displays a message that it is Internet Explorer 4.0+ specific. (New 20020708)
  • If the ONHELP event attribute is used, displays a message that it is Internet Explorer 4.0+ specific. (New 20020710)
  • If the ONMOUSEENTER or ONMOUSELEAVE event attribute is used, displays a message that they are Internet Explorer 5.5+ specific.(New 20020708)
  • If the ONMOUSEWHEEL event attribute is used, displays a message that it is Internet Explorer 6+ specific.(New 20020708)
  • If the UNSELECTABLE attribute is used, displays a message that it is Internet Explorer 5.5+ specific. (New 20020801)
  • If the FACE or COLOR attributes are used with the BASEFONT element, displays a message that these attributes are Internet Explorer specific and do not work with Netscape. (New 20000708)
  • If the _SEARCH value is used with the TARGET attribute, displays a message that it is Internet Explorer 5.0+ specific. (New 20020617)
  • If BGSOUND is used, displays a message that BGSOUND is Internet Explorer specific.
  • If the BGPROPERTIES, NOWRAP, and/or SCROLL attributes are used with the BODY element, displays a message that it is Internet Explorer specific.
  • If the LEFTMARGIN and/or TOPMARGIN attributes are used with the BODY element, displays a message that it is Internet Explorer specific.
  • If the VALIGN attribute is used with the CAPTION element, displays a message that it is Internet Explorer specific.
  • If FIELDSET is used, displays a message that FIELDSET is Internet Explorer specific.
  • If the FRAMESPACING attribute is used with the FRAMESET element, displays a message that it is Internet Explorer specific. (New 20000710)
  • If the COLOR attribute is used with the HR element, displays a message that it is Internet Explorer specific.
  • If the ALLOWTRANSPARENCY, APPLICATION, BORDERCOLOR, HSPACE, and/or VSPACE attributes are used with the IFRAME element, displays a message that these attributes are Internet Explorer specific. (New 20020520)
  • If the GALLERYIMG attribute is used with the IMG element, displays a message that this attribute is Internet Explorer 6.0+ specific. (New 20020708)
  • If the CONTROLS, DYNSRC, LOOP, LOOPDELAY, START, and/or VRML attributes are used with the IMG element, displays a message that the attributes are Internet Explorer specific and may be removed in future versions.
  • If LABEL is used, displays a message that LABEL is Internet Explorer specific.
  • If LEGEND is used, displays a message that LEGEND is Internet Explorer specific.
  • If MARQUEE is used, displays a message that MARQUEE is Internet Explorer and WebTV specific.
  • If the BORDERCOLOR, BORDERCOLORDARK, and/or BORDERCOLORLIGHT attributes are used with a TABLE, TD, TH, or TR element, displays a message that it is Internet Explorer specific.
Flag 2 (Netscape specific messages)
  • If the ARCHIVE attribute is used with the APPLET element, displays a message that ARCHIVE is Netscape specific.
  • If BLINK is used, displays a message that it is Netscape specific.
  • If the POINT-SIZE or WEIGHT attribute is used with the FONT element, displays a message that it is Netscape specific.
  • If the BORDER attribute is used with the INPUT element, displays a message that it is Netscape specific. (New 20000725)
  • If KEYGEN is used, displays a message that KEYGEN is Netscape specific.
  • If MULTICOL is used, displays a message that MULTICOL is Netscape specific.
  • If SPACER is used, displays a message that SPACER is Netscape and WebTV specific.
  • If the HSPACE or VSPACE attribute is used with the TABLE element, displays a message that it is Netscape specific.
  • If the BACKGROUND attribute is used with the TR element, displays a message that BACKGROUND is Netscape specific.
  • If the CLASS attribute is used with the TR element, displays a message that Netscape 4.x does not properly apply it to the TR element. (New 20020801)
Flag 3 (Deprecation messages)
  • If APPLET is used, displays a deprecation message that APPLET is deprecated in favor of the OBJECT element.
  • If DIR is used, displays a deprecation message that DIR is deprecated in favor of a UL list.
  • If the VERSION attribute is used with the HTML element, displays a deprecation message.
  • If ISINDEX is used, displays a deprecation message that ISINDEX is deprecated in favor of an INPUT element.
  • If MENU is used, displays a deprecation message that MENU is deprecated in favor of a UL list.
Flag 4 (Obsolete messages)
  • If BQ is used, displays a message that BQ is obsolete in favor of BLOCKQUOTE.
  • If COMMENT is used, displays a warning that COMMENT is obsolete and is Internet Explorer and Mosaic specific, and that <!-- --> should be used instead.
  • If FN is used, displays a message that FN is obsolete.
  • If LISTING is used, displays a message that LISTING is obsolete in favor of PRE.
  • If NEXTID is used, displays a message that its use is not recommended.
  • If NOTE is used, displays a message that NOTE is obsolete.
  • If PLAINTEXT is used, displays a message that PLAINTEXT is obsolete in favor of PRE.
  • If XMP is used, displays a message that XMP is obsolete in favor of PRE.
Flag 5 (General compatibility messages)
  • If a mailto link is used in an HREF attribute for an A tag and includes extra information (such as a subject or body), displays a message that this may cause a user to have problems when trying to send email with software that does not support extra information in a mailto link.
  • If the ONCONTEXTMENU event attribute is used, displays a message that it is Internet Explorer 5+ and Netscape 6+ specific.(New 20020708)
  • If ACRONYM is used, displays a message that ACRONYM may not be supported by older browsers such as Netscape v4.x.
  • If the MARGINHEIGHT or MARGINWIDTH attribute is used with the BODY element, displays a message that it is Netscape and Opera specific.
  • If BUTTON is used, displays a compatibility message.
  • If COL or COLGROUP is used, displays a compatibility message. (Changed 20020603)
  • If DEL is used, displays a compatibility message.
  • If DFN is used, displays a compatibility message.
  • If EMBED is used, displays a message that it is not supported by HTML 4.0 and recommends using the OBJECT element instead. (New 20000707)
  • If the PALETTE attribute is used with the EMBED element, displays a messages that it only has an effect on the Windows platform.
  • If the WIDTH attribute is used with the IMG or TABLE element and the value for WIDTH is a percent value greater than 100%, displays a message about browser support for this. (New 20020920)
  • If the ONMOUSEOVER and/or ONMOUSEOUT attributes are used with the FONT element, displays a message that these attributes are not valid HTML 4.01 attributes for the FONT element (New 20020603)
  • Displays a message if the non-HTML ALIGN, BORDERCOLOR, and/or FRAMESPACING attributes are used with FRAME.
  • If FRAMESET is used, displays a message that older browsers and text-only browsers may not support frames. (New 20000717)
  • Displays a message if the non-HTML BORDER, BORDERCOLOR, FRAMEBORDER, and/or FRAMESPACING attributes are used with FRAMESET.
  • If IFRAME is used, displays a message about IFRAME support.
  • If ALLOWTRANSPARENCY, APPLICATION, BORDERCOLOR, HSPACE, and/or VSPACE attributes are used with IFRAME, displays a message that these are not HTML 4.01 attributes. (New 20020520)
  • Displays a message about inconsistent rendering if the HEIGHT or WIDTH attribute is used with the IMG element and its value is a percent. (New 20020803)
  • If the SRC attribute is used and it specifies a BMP image for an IMG or INPUT element, displays a warning message about BMP image compatibility. (New 20020924)
  • Displays a message if the non-HTML HSPACE and/or VSPACE attributes are used with INPUT. (New 20000613)
  • If TYPE=FILE is used with the INPUT element, displays a message that it is only supported by Internet Explorer 4.0 and above and Netscape 3.0 and above.
  • If the INPUT, SELECT, and/or TEXTAREA element is used, displays a message that it may not be displayed by some browsers if it is not in a form.
  • If INS is used, displays a compatibility message.
  • If MAP is used, displays a message that it may not be supported by older browsers such as HTML 2.0 browsers. (New 20000717)
  • If NOBR is used, displays a message that it is only supported by Internet Explorer and Netscape.
  • If NOFRAMES is used in a BODY section, displays a messages that it is not supported by many browsers, even those supporting frames. (New 20000717)
  • If OBJECT is used, displays a compatibility message. (Changed 20020603)
  • If the WIDTH attribute is used with the PRE element, displays a message that it is not widely supported. (New 20000712)
  • If Q is used, displays a message about Q support.
  • If RUBY is used, displays a message that it is not widely supported. (New 20020116)
  • If SOUND is used, displays a message that it is only supported by Mosaic.
  • If SPAN is used, displays a message that it is not supported by Internet Explorer 3.0- and Netscape 3.0-. (New 20000922)
  • If the STYLE element or STYLE attribute is used, displays a message that style information is only supported by Internet Explorer 3.0+ and Netscape 4.0+.
  • If TABLE is used, displays a message that older browsers and nonvisual browsers may have problems using this element. (New 20000722)
  • If the COLS attribute is used with the TABLE element, displays a message that it is not an HTML/XHTML attribute. (New 20020805)
  • If the HEIGHT attribute is used with the TABLE element, displays a message that it is not an HTML 4.01 element and that it is not well supported. (New 20010124)
  • If the BACKGROUND attribute is used with TD or TH, displays a message that it is supported by Internet Explorer 3.0+ and Netscape 4.0+ and may not work with other browsers.
  • If WRAP is used with the TEXTAREA element, displays a messages that it is only supported by Internet Explorer 4.0+ and Netscape 3.0+. Also included is information about the values that WRAP can take with regards to the 4.0+ browsers.
  • If TFOOT is used, displays a message that some browsers may render the table footer before the table body. (New 20000722)
  • If WBR is used, displays a message that it is only supported by Internet Explorer and Netscape.
  • If TBODY, THEAD, or TFOOT is used, displays a compatibility message. (Changed 20020603)
  • If ABSBOTTOM, ABSMIDDLE, TEXTBOTTOM, TEXTMIDDLE, or TEXTTOP is used as an attribute value, displays a message that these values are not HTML 4.01 values and may not be supported by standards compliant browsers. (New 20011019)
  • If the COMPACT attribute is used, displays a message that it is poorly supported among browsers. (New 20020208)
Flag 6 (Helpful tip messages)
  • creating borderless frames
  • recommends using the TEXTAREA element instead of TYPE=TEXTAREA with an INPUT element
  • using EMBED to substitute for BGSOUND
  • If TOPMARGIN is used in BODY, suggests that you may also need to use MARGINHEIGHT to create the effect that you want in Netscape.
  • If LEFTMARGIN is used in BODY, suggests that you may also need to use MARGINWIDTH to create the effect that you want in Netscape.
  • If MARGINHEIGHT is used in BODY, suggests that you may also need to use TOPMARGIN to create the effect that you want in Internet Explorer.
  • If MARGINWIDTH is used in BODY, suggests that you may also need to use LEFTMARGIN to create the effect that you want in Internet Explorer.
  • If INPUT with TYPE=IMAGE is used without the BORDER attribute, suggests that BORDER=0 be used so that the image is drawn with no border in both Internet Explorer and Netscape. (New 20000725)
  • If NOBR is used, displays a message about possible problems using this element and recommends that you be careful. (New 20000720)
  • If the NOWRAP table attribute is used, displays a message about possible problems using this attribute and recommends that you be careful. (New 20000716)
Flag 7 (Style messages)
  • Displays a message when skipping heading levels (for example, using H4 before using H1, H2, and H3); however, allows the first heading to be any level without displaying an out of order message.
  • Displays a message if "click here" or "this link" or a similar link description is used. This is considered to be bad style. (New 20020722)
  • If APPLET is used without the ALT attribute, displays a message that ALT should be used.
  • If BGPROPERTIES=FIXED is used with the BODY element, displays a message stating that it is considered to be bad style and to be annoying.
  • If BLINK is used, displays a message stating that some consider using BLINK to be bad style and to be annoying.
  • If WIDTH is "0*" for COL or COLGROUP then displays a message that this may prevent user agents from rendering the table incrementally and therefore may be considered bad style, especially for large tables. (New 20010223)
  • If IMAGE is used without all of the following attributes: ALT, HEIGHT, WIDTH, displays a message that these attributes should all be used. Displays this message a maximum of ten times.
  • If INPUT with TYPE=IMAGE is used without all of the following attributes: ALT, HEIGHT, WIDTH, displays a message that these attributes should all be used.
  • If MARQUEE is used without the HEIGHT attribute, displays a message that it should be used.
  • If U is used, displays a message that underlining may confuse visitors because most browsers underline hyperlinks. (New 20000712)
Flag 8 (Search engine messages)
  • If FRAMESET is used, displays a message that frames may cause problems with site indexing by search engines. (New 20010221)
  • If a META DESCRIPTION tag is not used, displays a comment recommending that it be used.
  • If a META KEYWORDS tag is not used, displays a comment recommending that it be used.
  • If <META HTTP-EQUIV="refresh" ... >' is used, displays a message stating that search engines may penalize sites that use refresh.
  • If the document's title is less than 5 words or more than 15 words, displays a message recommending a title that is 5-15 words in length. (New 20020717)
  • If repeated keywords or phrases are found in a META KEYWORDS tag, displays a message that this could be considered spamming. (New 20020802)
Flag 9 (More deprecation messages)

These are deprecation messages for certain HTML 4.0 deprecated tags and attributes that are still considered to be in high use or still useful. Many authors may still be using these attributes and may want to uncheck this flag.

  • If the NAME attribute is used with the A, APPLET, FORM, FRAME, IFRAME, IMG, or MAP elements in an XHTML 1.0 document, displays a deprecation message. (New 20020808)
  • If the BASEFONT, CENTER, FONT, S, STRIKE, and/or U element is used, displays a deprecation message.
  • If the ALIGN attribute that can have a value of LEFT, CENTER, RIGHT, or JUSTIFY is used, displays a deprecation message. (New 20000712)
  • If the BACKGROUND, TEXT, LINK, VLINK, and/or ALINK attributes are used with the BODY element, displays a deprecation message. (New 20000712)
  • If the ALIGN attribute is used with the CAPTION element, displays a deprecation message. (New 20000716)
  • If the CLEAR attribute that can have a value of ALL, LEFT, NONE, or RIGHT is used, displays a deprecation message. (New 20000712)
  • If the COMPACT attribute is used with the DL element, displays a deprecation message. (New 20000715)
  • If the ALIGN, NOSHADE, SIZE, and/or WIDTH attributes are used with the HR element, displays a deprecation message. (New 20000712)
  • If the ALIGN attribute is used with the LEGEND element, displays a deprecation message. (New 20000719)
  • If the TYPE, and/or VALUE attributes are used with the LI element, displays a deprecation message. (New 20000715)
  • If the COMPACT, START, and/or TYPE attributes are used with the OL element, displays a deprecation message. (New 20000715)
  • If the WIDTH attribute is used with the PRE element, displays a deprecation message. (New 20000712)
  • If the ALIGN and/or BGCOLOR attribute is used with the TABLE element, displays a deprecation message. (New 20000716, BGCOLOR new 20010314)
  • If the BGCOLOR, HEIGHT, NOWRAP, and/or WIDTH attribute is used with the TD or TH element, displays a deprecation message. (New 20000716)
  • If the BGCOLOR attribute is used with the TR element, displays a deprecation message. (New 20000716)
  • If the COMPACT and/or TYPE attributes are used with the UL element, displays a deprecation message. (New 20000715)
Flag 10
  • Displays a comment about how you can disable certain messages by unchecking validator flags. You will probably want to disable this message by unchecking flag 10. The reason for this message is to make you aware of how easy it is to disable messages that you may not want to see.
Flag 11
  • Enables sound, such as playing a sound if there are any errors or warnings. Also plays a different sound if there are no errors or warnings. Uncheck this flag if you want to disable these sounds for any reason.
Flag 12
  • When unchecked, does not change the priority of HTML Validator before validating a document. This means that HTML Validator usually runs at normal priority. When checked, the priority will be set to low before each validation if HTML Validator believes that it is best that it should work in the background (for instance, when HTML Validator is run from command line parameters). This will more easily allow you to do work with other applications while CSE HTML Validator processes documents in the background.
Flag 13

Some users may want to uncheck this flag. However, it is recommended that you use ALT for IMG and AREA elements and that you leave this flag checked.

  • If the HTML 4.0 category is active, displays an accessibility warning message when ALT is not used with an IMG elements.
  • If the HTML 4.0 category is active, displays an accessibility warning message when ALT is not used with an AREA element.
Flag 14
  • When the validator is generating an easily parsed output file and this flag is set, displays a status comment containing information such as the number of tag names, comments, entities, etc. (Requires CSE 3.9910 or later)
Flag 15
  • If a PICS-Label is not present in a META tag in the HEAD section of a document, displays a message about PICS-Labels and ICRA.
Flag 16
  • Displays an error message that HTML 4.0 requires the TYPE attribute for the script element when TYPE is missing. This flag lets you disable this message because current browsers may have problems with this attribute or do not use it.
Flag 17
  • Displays a comment message when tables may be too deeply nested and cause a problem.
Flag 18
  • Displays a warning message if LI is used outside of a UL, OL, DIR, or MENU list.
Flag 19
  • Displays a comment if the NATURALSIZEFLAG attribute is used in the document (usually added by Adobe PageMill). This attribute is not a valid HTML/XHTML attribute.
  • Displays a comment if the MSIMAGELIST attribute is used in the document (usually added by Microsoft FrontPage 2000). This attribute is not a valid HTML/XHTML attribute.
  • Displays a comment if the NOF attribute is used in the document (usually added by NetObjects Fusion). This attribute is not a valid HTML/XHTML attribute. (New 20020315)
Flag 20 (SMIL style messages)
  • Displays a message if the TITLE attribute is not used with a SMIL element where its use is recommended.
Flag 21 (WebTV specific messages)
  • If the SELECTED attribute is used with the A element, displays a message that it is WebTV specific.
  • If AUDIOSCOPE is used, displays a message that AUDIOSCOPE is WebTV specific.
  • If BLACKFACE is used, displays a message that BLACKFACE is WebTV specific.
  • If the CREDITS, INSTRUCTIONS, and/or LOGO attributes are used with the BODY element, displays a message that it is WebTV specific.
  • If the EFFECT and/or TRANSPARENCY attributes are used with the FONT element, displays a message that it is WebTV specific.
  • If the INVERTBORDER attribute is used with the HR element, displays a message that it is WebTV specific.
  • If the SELECTED and/or TRANSPARENCY attributes are used with the IMG element, displays a message that it is WebTV specific.
  • If the BGCOLOR, CURSOR, and/or USESTYLE attributes are used with the INPUT or TEXTAREA elements, displays a message that it is WebTV specific.
  • If MARQUEE is used, displays a message that MARQUEE is Internet Explorer and WebTV specific.
  • If the AUTOACTIVATE, BGCOLOR, SELCOLOR, TEXT, and/or USESTYLE attributes are used with the SELECT element, displays a message that it is WebTV specific.
  • If SPACER is used, displays a message that SPACER is Netscape and WebTV specific.
  • If the GRADANGLE, GRADCOLOR, and/or TRANSPARENCY attributes are used with the TABLE, TD, or TH element, displays a message that it is WebTV specific.
  • If the TRANSPARENCY attribute is used with the TR element, displays a message that it is WebTV specific.
  • If the TRANSPARENCY attribute is used with the MARQUEE element, displays a message that it is WebTV specific.
Flag 22
  • Displays a warning when the ALIGN attribute is used without the WIDTH attribute in an HR element.
Flag 23 (WebTV Comments)
  • Displays a comment about optimizations when the TRANSPARENCY attribute is set to 50, if the TRANSPARENCY attribute is used.
Flag 24
  • Displays a warning message if the "html" element is used without a DOCTYPE (document type declaration). Displays different messages for HTML and XHTML documents.
  • Displays a comment message for XHTML documents if the "html" element was used without an XML declaration.
  • Displays a comment message for WML documents if the "wml" element was used without an XML declaration.
Flag 25
  • Displays a message if an HTML document is over 30,000 bytes and suggests that some people may consider the document too large.
Flag 26
  • If a Content-Type is not present in a META tag in the HEAD section of a document, displays a message about using a Content-Type META tag.
Flag 27
  • Displays a message that HTML 4.01 allows the NAME attribute with a FORM element for backward compatibility and also recommends using the ID attribute to identify elements if the NAME attribute is used with a FORM element and the HTML 4.0 category is active.
Flag 28
  • Displays a warning message if an ADDRESS, BLOCKQUOTE, CENTER, DIR, DIV, DL, FIELDSET, FORM, H1, H2, H3, H4, H5, H6, HR, ISINDEX, MENU, NOFRAMES, NOSCRIPT, OL, P, PRE, TABLE, or UL tag is contained within an inline element (like B, I, etc., except for FONT-- see Flag 30).
Flag 29 is no longer used.
Flag 30
  • Displays a warning message if an ADDRESS, BLOCKQUOTE, CENTER, DIR, DIV, DL, FIELDSET, FORM, H1, H2, H3, H4, H5, H6, HR, ISINDEX, MENU, NOFRAMES, NOSCRIPT, OL, P, PRE, TABLE, or UL tag is contained within a FONT tag.
Flag 31
  • Displays a message if any of the following tags are contained within another tag of the same type: ABBR, ACRONYM, B, BIG, CITE, CODE, DFN, EM, H1, H2, H3, H4, H5, H6, I, KBD, Q, S, SAMP, SMALL, STRIKE, STRONG, SUB, SUP, TT, U, VAR. Example: "<B> Bold <B> Bold again </B></B>" would generate a message for the second B tag.
Flag 32
  • Displays a warning message if a HEAD section does not contain a title (using the TITLE element; required by HTML 4.0).
  • Displays a warning message when an HTML document does not contain a HEAD section (required by HTML 4.0).
Flag 33
  • Displays a message if certain attributes have values that have leading or trailing spaces, such as the HREF, NAME, and TARGET attributes for A, and the SRC attribute for IMG.
Flag 34
  • Displays a warning message if it appears that an absolute URL is missing the protocol (like HREF="www.htmlvalidator.com" would be missing "http://" in front of "www.htmlvalidator.com")
Flag 35
  • Displays a message when linking to an ID link destination that browser support is currently poor for this.
Flag 36
  • Displays a message when the STYLESRC attribute is used with the BODY element. STYLESRC is not an HTML element but is used by Microsoft FrontPage and FrontPage server extensions.
Flag 37
  • Displays a message that an XHTML, SMIL, RealText, or WML document was detected if HTML Validator detects that type of document.
Flag 38
  • Displays a warning about backward compatibility when a quick close tag is used without a leading space for XHTML documents. This flag overrides the corresponding setting in the validator options for XHTML documents only.
Flag 39
  • Performs email address syntax checking and displays a warning when an email address does not pass the check.
Flag 40 is no longer used.
Flag 41
  • Displays a message when DIV or SPAN is used without any attributes. (New 20000613)
Flag 42
  • Displays a warning when text is used in a DIR or MENU list and it is not in an LI section. (New 20000618)
Flag 43
  • Displays a warning if the HTML 4.0 category is active, the STYLE attribute has been used, and a default style sheet language has not been specified in the HEAD section. (New 20000712)
Flag 44
  • If TABLE is used without a CAPTION element, displays a message to consider using the CAPTION element. As of 20020624, this flag will generate a maximum of only ten of these messages. (New 20000716)
Flag 45
  • If TYPE=TEXTAREA is used with the INPUT element, displays a warning message that it is not HTML compliant and to consider using the TEXTAREA element instead. (New 20000718)
Flag 46 (Accessibility messages)
  • If FRAMESET is used, displays an accessibility message about using frames. (New 20000724)
  • If TABLE is used without a SUMMARY attribute, displays a message to consider using the SUMMARY attribute. As of 20020611, this flag will generate a maximum of only ten of these messages. (New 20000612)
Flag 47 (Using lists to indent)
  • This flags generates messages if the UL or OL element is not used properly. For example, when it is used for indenting without using any LI elements or when it contains text that is not in an LI tag. If you incorrectly use these elements to indent, then you may want to disable this flag to keep certain error and warning messages from appearing. Of course it is better to not incorrectly use these elements or any other element. You should use style sheets for indenting. (New 20000816)
Flag 48
  • Displays a message if no option is explicitly selected by using the SELECTED attribute with an option in a SELECT tag. (New 20000817)
Flag 49
  • Displays a warning message if the ACTION attribute is not used with the FORM element as required by HTML 4.01. You may want to disable this flag if you use JavaScript events (like OnClick) instead of the ACTION attribute. (New 20000824)
Flag 50
  • Unused in v5.00.
Flag 51 (Spaces in URLs)
  • Displays a warning message when space characters are used in URLs. Suggests using the underscore (_) character instead or encoding spaces as "%20". (New 20000906)
Flag 52 (Incorrect URL encoding)
  • Displays a warning message when the '%' character appears in a URL and is not followed by a two digit hexadecimal number. This may indicate improper URL encoding. (New 20000906)
Flag 53
  • Displays an error message if the NAME (002) attribute is used with the META element and its value does not begin with a letter (A-Z or a-z) and consist of the following characters: (A-Z), (a-z), (0-9), hyphens (-), underscores (_), colons (:), and periods (.). (New 20000912, changed 20020321)
  • Displays an error message similar to the above but if the HTTP-EQUIV attribute is used with the META element (New 20020321)
  • Displays an error message similar to the above but if the LANG, HREFLANG, FOR, or "xml:lang" attribute is used (New 20020321)
Flag 54
  • If TABLE is used without the WIDTH attribute, displays a message that using this attribute is good style and may cause the table and page to render faster. As of v5.50, does not display this message for XHTML Basic documents because this attribute is not allowed. (New 20000922)
Flag 55
  • Displays a warning message if certain block-level elements are used within certain other block-level elements, like using H2 or UL in a heading tag. (New 20000924)
Flag 56
  • Displays a warning message if a block-level element like TABLE or H1 is used within a P tag that has been explicitly closed. To benefit from this checking and for good style, you should close your P tags. (New 20001226)
Flag 57
  • Displays an estimate of the document's transfer time for various transfer rates based on the document's estimated byte size. Due to inefficiencies and overhead, time is calculated assuming that one byte requires a rate of 10 bits per second (not 8 bps) to transfer that byte in one second. 1 Kbps is considered equivalent to 1000 bps (not 1024 bps). (New 20001218)
Flag 58
  • Uncheck this flag to run the validation in "errors only" mode. In this mode, only errors are displayed and some "less important" errors may not be displayed, such as when an attribute value is not quoted. Use this mode to target significant errors. (New 20001221)
Flag 59
  • Uncheck this flag to run the validation in "errors and warnings only" mode. In this mode, only errors and warnings are displayed and some "less important" errors and warnings may not be displayed. This mode is more thorough than "errors only" mode. (New 20001221)
Flag 60
  • Displays a warning message if HTML Validator thinks that an A HREF value may be in an invalid form (such as using htp:// instead of http://). (New 20001221)
Flag 61
  • Checks the spelling of certain attribute values, like the values for the ALT and SUMMARY attributes. The value for CONTENT is also checked for META NAME=DESCRIPTION tags. Spell checking must be enabled or this flag has no effect. (New 20010103)
Flag 62 (Netscape specific warning messages)

These messages have been made warnings and moved to a new flag because we believe that authors should abandon the use of these proprietary tags. This is due to their lack of standards compliance and the tags being dropped from Netscape 6+.

  • If ILAYER is used, displays a warning message that ILAYER is Netscape 4.x specific (and doesn't work with Netscape 6+). Recommends against using this element. Previously under flag 2.
  • If LAYER is used, displays a warning message that LAYER is Netscape 4.x specific (and doesn't work with Netscape 6+). Recommends against using this element. Previously under flag 2.
Flag 63
  • Displays a error message if it appears that an invalid charset is specified in a CONTENT-TYPE attribute value in a META tag. (New 20010613)
Flag 64
  • Uncheck this flag to override and disable the "Check entities in attribute values" option in the Validator Engine Options. If this flag is checked, then the setting for "Check entities in attribute values" option is not overridden and this flag has no effect. (New 20010820)
Flag 65
  • Checks the DOCTYPE against a list of recognized DOCTYPEs and generates a warning message if the DOCTYPE is not in the list. Also see flag 78.
  • Recognized DOCTYPEs are
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html401/strict.dtd"> (New 20020129)
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd"> (New 20020129)
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> (New v5.4920)
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html401/frameset.dtd"> (New 20020129)
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN" "http://www.w3.org/TR/REC-html40/frameset.dtd">
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd"> (New 20020614)
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
  • When checking to see if a DOCTYPE is recognized, a case sensitive compare is made.
  • Multiple contiguous whitespace characters are converted to a single space character so that valid DOCTYPEs with multiple contiguous whitespace characters or line breaks can still match a recognized DOCTYPE.
  • Note that a DOCTYPE may still be valid if it doesn't pass this test. If a valid DOCTYPE doesn't pass this test, then you can 1) reformat the DOCTYPE to pass the test (so that it matches one of the above), 2) ignore the warning, or 3) disable the flag so that the test is not performed.
  • To add a new recognized DOCTYPE, goto the Configuration Editor and use the setValueString(3, DOCTYPEstring) function in the onConfigLoad() function (choose the Functions radio button in the Programs tab of the Configuration Editor and find the onConfigLoad() function). Do not include the '<' character at the beginning of the DOCTYPE or the '>' character at the end of the DOCTYPE. Example: setValueString(3, '!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"');
  • (New 20010820)

IMPORTANT MESSAGE ABOUT SECTION 508 ACCESSIBILITY STANDARDS: CSE HTML Validator cannot and does not check for complete compliance. It is the web developer's duty to ensure total compliance. However, CSE HTML Validator is designed to help a web developer create or redesign documents so that they are compliant.

For more information about Section 508: Section 508 Web Site, Section 508 Standards

Flag 66 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Displays a message if the APPLET, AREA, or INPUT element is used without the ALT attribute. As of 20020603, a message is not generated for an INPUT tag used without the ALT attribute unless it is of TYPE=IMAGE.
  • Displays a message if the FRAME, or IFRAME element is used without the ALT attribute.
  • Displays a message if the IMG element is used without the ALT and/or LONGDESC attribute(s).
Flag 67 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Displays a message to use redundant text links if the IMG element is used with the ISMAP attribute.
Flag 68 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Displays a message to use client-side image maps instead of server-side if the IMG element is used with the ISMAP attribute.
Flag 69 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Displays a message to use row and column headers for data tables when the TABLE element is used.
Flag 70 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Displays a message if the FRAME or IFRAME element is used without the TITLE attribute.
Flag 71 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Displays a message to use markup to associate data cells and header cells for data tables that have two or more logical levels of row or column headers when the TABLE element is used.
Flag 72 (Section 508 Standards)
  • Generates messages to help comply with US Government Section 508 Accessibility Standards. For more information, please see http://www.section508.gov/. (New 20011030)
  • Uncheck this flag to disable all section 508 accessibility flags. Use this as a shortcut to disabling each individual section 508 flag if you do not want to generate section 508 accessibility messages.
Flag 73 (Section 508 Standards)
  • Uncheck this flag to disable the message indicating whether the section 508 accessibility messages are enabled or not. This message also provides a shortcut to enabling and disabling the section 508 accessibility messages if using the integrated editor. This is because flag 72 can be disabled or enabled by right-clicking on the message that this flag generates.
Flag 74
  • Displays an error message when non-XHTML 1.1 elements are used in a XHTML 1.1 document. (New 20020115)
  • Non-XHTML 1.1 elements that generate an error message when used are: APPLET, BASEFONT, BGSOUND, BLINK, CENTER, COMMENT, DIR, EMBED, FONT, FRAME, FRAMESET, IFRAME, ILAYER, ISINDEX, KEYGEN, LAYER, LISTING, MARQUEE, MENU, MULTICOL, NEXTID, NOBR, NOEMBED, NOFRAMES, NOLAYER, PLAINTEXT, S, SERVER, SOUND, SPACER, STRIKE, U, WBR, WINDOW, WML, XMP
  • Requires CSE HTML Validator Professional DLL version 5.02 or higher.
Flag 75
  • Displays a warning message when HREF="#" is used in an A tag. (New 20020124, changed from error to warning message 20020329)
  • Displays a warning message when the HREF value in an A tag ends with a # character and appears to not include an internal link (New 20020605)
Flag 76
  • Similar to flag 74 but for strict HTML 4.0/4.01 documents. (New 20020208)
Flag 77
  • Displays a warning message if certain tags (like FONT and CENTER) are used with a strict HTML 4.0/4.01 or XHTML DOCTYPE.
  • This flag is automatically disabled in later configuration files because this functionality was replaced by improved functionality (see flags 74, 76, and 83).
  • Requires CSE HTML Validator Professional DLL version 5.02 or higher or these warning messages cannot be disabled if they appear.
Flag 78
  • Adds DOCTYPEs with omitted URIs to the list of recognized DOCTYPEs. Also see flag 65.
  • Recognized DOCTYPEs added are
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
    • <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN">
    • <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN">
  • Requires CSE HTML Validator Professional DLL version 5.02 or higher to add these DOCTYPEs.
Flag 79
  • Displays an error message when the NAME attribute is used with the A or MAP element in an XHTML 1.1 document. The ID attribute should be used instead. (New 20020206)
Flag 80
  • Displays an error message when certain non-XHTML 1.1 attributes are used with certain elements in a document that has an XHTML 1.1 DOCTYPE. (New 20020208)
    • ONAFTERPRINT, ONBEFORECOPY, ONBEFORECUT, ONBEFOREPASTE, ONBEFOREPRINT, ONCONTEXTMENU, ONCOPY, ONCUT, ONDRAGSTART, ONMOUSEENTER, ONMOUSELEAVE, ONMOUSEWHEEL, ONPASTE, or ONSELECTSTART event attribute is used
    • NAME used with the A, APPLET, FORM, FRAME, IFRAME, IMG, and MAP elements
    • TARGET used with the A, AREA, BASE, FORM, or LINK elements
    • ALIGN, ALINK, BACKGROUND, BGPROPERTIES, CREDIT, HEIGHT, LEFTMARGIN, MARGINHEIGHT, MARGINWIDTH, NOWRAP, INSTRUCTIONS, LINK, LOGO, SCROLL, TEXT, TOPMARGIN, VLINK, WIDTH used with the BODY element
    • ALIGN or VALIGN used with the CAPTION element
    • COMPACT used with the DL element
    • ALIGN, COLOR, NOSHADE, SIZE, or WIDTH used with the HR element
    • SCROLL used with the HTML element
    • BORDER used with the IMG element (New v5.4920)
    • ALIGN used with the LEGEND element
    • TYPE, VALUE used with the LI element
    • COMPACT, START, or TYPE used with the OL element
    • WIDTH used with the PRE element
    • ALIGN, BGCOLOR, BORDERCOLOR, BORDERCOLORLIGHT, BORDERCOLORDARK, HEIGHT, HSPACE, or VSPACE used with the TABLE element
    • BACKGROUND, BGCOLOR, BORDERCOLOR, BORDERCOLORLIGHT, BORDERCOLORDARK, HEIGHT, NOWRAP, or WIDTH used with the TD or TH elements
    • BACKGROUND, BGCOLOR, BORDERCOLOR, BORDERCOLORLIGHT, or BORDERCOLORDARK used with the TR element
    • COMPACT or TYPE used with the UL element
Flag 81
  • Similar to flag 80 but for strict HTML 4.0/4.01 documents. (New 20020208)
Flag 82
  • Similar to flag 80 but for strict XHTML 1.0 documents. (New 20020208)
Flag 83
  • Similar to flag 74 but for strict XHTML 1.0 documents. (New 20020208)
Flag 84
  • Displays a warning message if certain attributes (like ALIGN, BGCOLOR, and WIDTH) are used with a strict HTML 4.0/4.01 or XHTML DOCTYPE.
  • This flag is automatically disabled in later configuration files because this functionality was replaced by improved functionality (see flags 80, 81, and 82).
  • Requires CSE HTML Validator Professional DLL version 5.02 or higher or these warning messages cannot be disabled if they appear.
Flag 85
  • Displays a warning message if the NAME attribute is not used with the INPUT element if the INPUT element is of TYPE=TEXT, TYPE=PASSWORD, TYPE=HIDDEN, or TYPE=TEXTAREA and the INPUT element is in a form. (New 20020226)
Flag 86
  • If a description or keywords META tag is used, displays a comment message about optimizing search engine listings with SEO. (New 20020321)
Flag 87
  • If "table" is used in "center", displays a message that different browsers may render a centered table differently. (New 20020409, removed from flag 5)
Flag 88 (General compatibility)
  • Displays a message about how XML declarations may trigger "quirks" mode if an XML declaration is used in an XHTML document. (New 20020513)
Flag 89
  • Displays a warning message if the "type" attribute for a "style" tag does not equal "text/css". (New 20020520)
Flag 90
  • Displays an error message if the "lang" or "hreflang" attribute appears to have an invalid value. (New 20020520)
Flag 91
  • Displays a warning message if both "lang" and "xml:lang" attributes are not used when specifying a language in an XHTML 1.0 document with either the "lang" or "xml:lang" attribute but not both. (New 20020520)
Flag 92
  • Displays a error message if the "name" attribute is used with the "a" tag and the value for the "name" attribute begins with a # character. (New 20020521)
Flag 93
  • Displays a message that the "target" attribute is ignored if the "target" attribute is used with an "a" tag that has a "name" attribute but no "href" attribute. (New 20020521)
Flag 94
  • Displays a warning message if two or more adjacent hyphens are used in a comment. (New 20020521)
Flag 95
  • Displays a warning message about possible browser compatibility problems if a comment ends in "-- >" instead of "-->". (New 20020522)
Flag 96
  • Displays an error message for nested elements that are configured as "ignore to end tag" (such as the "script" and "style" elements). (New 20020528)
Flag 97 (Opera specific messages)
  • If the "align", "height", and/or "width" attributes are used with the "body" element, displays a message that these attributes are only supported by Opera 4.0.
  • When the "ondblclick" attribute is used, displays a message that Opera (including version 6) does not support this attribute. (New 20020604)
Flag 98
  • Displays a message recommending the use of the "US-ASCII" character set if a content-type "meta" tag is used and a charset other than "US-ASCII" or "UTF-8" is specified. (New 20020605)
Flag 99
  • Displays a warning message if '>' is used in the text portion of an HTML document. (New 20020613; only the flag to control the message is new, not the message itself)
Flag 100
  • Adds DOCTYPEs with relative URIs to the list of recognized DOCTYPEs. Relative URIs are not recommended so you may want to disable this flag. Also see flag 65.
  • Recognized DOCTYPEs added are
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> (New v5.01)
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd"> (New v5.01)
    • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "DTD/xhtml1-frameset.dtd"> (New v5.01)
  • Requires CSE HTML Validator Professional DLL version 5.02 or higher to add these DOCTYPEs.
Flag 101
  • Similar to flag 74 but for XHTML Basic documents. (New 20020614)
  • In addition to the elements in flag 74, does not allow the following elements: "area", "b", "bdo", "big", "button", "col", "colgroup", "del", "fieldset", "hr", "i", "ins", "map", "noscript", "optgroup", "script", "small", "style", "sub", "sup", "tbody", "tfoot", "thead", "tt".
Flag 102
  • Displays error messages if duplicate "id" or "name" ("name" for the "a" element) attribute values are used. This error message is not new but the flag to disable the message is. It is unusual and not recommended to disable this flag. (New 20020617)
Flag 103
  • Displays a message if the "title" attribute is used and has an empty string as its value. Also displays a note about using "title" set to an empty string as a method that can be used to prevent Internet Explorer from displaying "alt" text as a tooltip. (New 20020617)
Flag 105
  • Displays a warning message if "alt" text is used with a value of "spacer" in an "img" element. The proper value for "alt" text should be "". (New 20020620)
Flag 104
  • Displays a warning message if the contents of the "script" or "style" tag is not enclosed in a comment. (New 20020806)
Flag 106
  • Displays a warning message if the value for the "face" attribute in a "font" or "basefont" element contains "ariel". It is a common mistake to spell the font "arial" as "ariel". (New 20020620)
Flag 107 (Search engine messages)
  • Displays a message if the meta tag description is over 200 characters and recommends a maximum of 200 characters. (New 20020627)
  • Displays a message if the meta tag description is less than 100 characters and recommends a minimum of 100 characters. (New 20020717)
  • Displays a message if the meta tag keywords is over 800 characters and recommends a maximum of 800 characters. (New 20020718)
  • Displays a message if the meta tag keywords is less than 100 characters and recommends a minimum of 100 characters. (New 20020718)
Flag 108
  • Displays a warning message if the document does not appear to have a title in the document's "title" tag, such as if the title is blank ("") or is "Untitled". (New 20020628)
Flag 109
  • Displays an error message for XHTML documents when a tag that would normally require a separate end tag in HTML 4 is "quick closed" (like "a", "b", etc.). It is highly recommended that you leave this flagged checked for XHTML backward compatibility reasons. (New 20020628)
Remaining Flags
  • As of the time of this writing, the remaining flags that are not listed are not currently used and are for future use.

Notes

  • If you want to disable all tag name program functionality (not recommended), you can uncheck the Enable programs validator engine option. This will cause any messages (such as the above messages) generated by a tag name program to not be displayed. It will also speed up the validation engine. However, disabling the tag name programs may significantly reduce the effectiveness of the validation. NOTE: The tag name program feature is considered to be a powerful feature of CSE HTML Validator Professional, and therefore should not be disabled.
  • If you want to disable a tag name program for a specific tag name, you can use the Programs Tab in the Configuration Editor to select the tag name with the program you wish to disable and then uncheck the Enable open program for tag or Enable close program for tag option.

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