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Glossary

character
An atom of information, for example a letter or a digit. Graphic characters have associated glyphs, where as control characters have associated processing semantics.
character encoding scheme
A function whose domain is the set of sequences of octets, and whose range is the set of sequences of characters from a character repertoire; that is, a sequence of octets and a character encoding scheme determines a sequence of characters.
character repertoire
A finite set of characters; e.g. the range of a coded character set.
code position
An integer. A coded character set and a code position from its domain determine a character.
coded character set
A function whose domain is a subset of the integers and whose range is a character repertoire. That is, for some set of integers (usually of the form {0, 1, 2, ..., N} ), a coded character set and an integer in that set determine a character. Conversely, a character and a character set determine the character's code position (or, in rare cases, a few code positions).
conforming HTML user agent
A user agent that conforms to this specification in its processing of the Internet Media Type `text/html; version=2.0'.
data characters
Characters other than markup, which make up the content of elements.
DTD
document type definition. @@ A collection of declarations (entity, element, attribute, link, map, etc.) in SGML syntax that defines the components and structures available for a class (type) of documents. [SGML]
element
@@A component of the hierarchical structure defined by the document type definition; it is identified in a document instance by descriptive markup, usually a start-tag and an end- tag. [SGML]
entity
data with an associated notation or interpretation; for example, a sequence of octets associated with an Internet Media Type. [SGML]
HTML document
An SGML document conforming to this document type definition.
markup
Syntactically delimited characters added to the data of a document to represent its structure. There are four different kinds of markup: descriptive markup (tags), references, markup declarations, and processing instructions.[SGML]
may
The implementation is not obliged to follow this in any way.
message entity
a head and body. The head is a collection of name/value fields, and the body is a sequence of octets. The head defines the content type and content transfer encoding of the body. [MIME]
minimally conforming HTML user agent
A user agent that conforms to this specification in its treatment of the Internet Media Type "text/html; level=0; version=2.0"
must
If this is not followed, the implementation does not conform to this specification.
SGML document
A set of entities, including the document entity, which is a text entity that conforms to the grammar specified in the SGML standard.[SGML]
shall
If a document or user agent conflicts with this statement, it does not conform to this specification.
should
If a document or user agent conflicts with this statement, undesirable results may occur in practice even though the document or user agent conforms to this specification.
tag
Markup that delimits an element. A tag includes a name which refers to an element declaration in the DTD, and may include attributes.[SGML]
text entity
A finite sequence of characters. A text entity typically takes the form of a sequence of octets with some associated character encoding, transmitted over the network or stored in a file.[SGML]
typical
Typical rendering is described for many elements. This is not a mandatory part of the specification but is given as guidance for designers and to help explain the uses for which the elements were intended.
URI
A Universal Resource Identifier is a formatted string that serves as an identifier for a resource, typcally on the Internet. URIs are used in HTML to identify the destination of hypertext links, the source of in-line images, and the object of form actions. URIs in common use include Uniform Resource Locators (URLs)[URL] and Relative URLs[RELURL].
user agent
A component of a distributed system that presents an interface and processes requests on behalf of a user; for example, a www browser or a mail user agent.
WWW
The World-Wide Web is a hypertext-based, distributed information system created by researchers at CERN in Switzerland. Users may create, edit or browse hypertext documents. `http://www.w3.org/'

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