<rule language="HTML" name="All" rule="ANY" description="All defined tags are valid."/>
<rule language="HTML" name="Netscape only" rule="NN2|NN3|NN4" description="Valid tags are only ones that are defined in any version of Netscape Navigator/Communicator."/>
<rule language="HTML" name="Internet Explorer only" rule="IE3|IE4" description="Valid tags are only ones that are defined in any version of Internet Explorer."/>
<rule language="HTML" name="HTML 3.2 only" rule="HTML32" description="Valid tags are only ones that are defined in the HTML 3.2 specification."/>
<rule language="HTML" name="HTML 3.2 or 4" rule="HTML32|HTML40" description="Valid tags are only ones that are defined in the HTML 3.2 or HTML 4 specifications."/>
<rule language="HTML" name="HTML 4 only" rule="HTML40" description="Valid tags are only ones that are defined in the HTML 4 specification."/>
<rule language="HTML" name="Version 3 browsers only (cross browser)" rule="NN3&IE3" description="Valid tags are only ones that are defined in both Netscape 3 and IE 3."/>
<rule language="HTML" name="Version 4 or later browsers only (cross browser)" rule="NN4&(IE4)" description="Valid tags are only ones that are defined in both Netscape 4 and IE 4 or 5."/>
<rule language="ASP" name="All" description="All defined ASP objects are valid." rule="ANY"/>
<rule language="ASP" name="ASP v1 only" description="Only objects defined in ASP v1 are valid." rule="ASP1"/>
<rule language="ASP" name="ASP v1 and v2" description="Objects defined in ASP v1 or v2 are valid." rule="ASP1|ASP2"/>
<rule language="DOM" name="All" description="All defined DOM objects are valid." rule="ANY"/>
<rule language="DOM" name="DOM only" description="Only objects defined in the DOM v1 specification are valid." rule="DOM1"/>
<rule language="DOM" name="IE only" description="Only objects defined in Internet Explorer are valid." rule="IE2|IE3|IE4"/>
<rule language="DOM" name="Netscape only" description="Only objects defined in Netscape are valid." rule="NN2|NN3|NN4"/>
<rule language="DOM" name="Version 4 or later browsers only (cross browser)" description="Valid objects are only ones that are defined in both Netscape 4 and IE 4 or 5." rule="(NN2|NN3|NN4)&(IE2|IE3|IE4)"/>
<rule language="DOM" name="Version 3 browsers only (cross browser)" description="Valid tags are only ones that are defined in both Netscape 3 and IE 3." rule="(NN2|NN3)&(IE2|IE3)"/>
<rule language="JavaScript" name="All" description="All defined JavaScript objects, keywords etc. are valid." rule="ANY"/>
<rule language="JavaScript" name="ECMAscript only" description="Only Javascript elements defined in ECMAscript v1 are valid." rule="ECMA1"/>
<rule language="JavaScript" name="JScript only" description="Only Javascript elements defined in any version of JScript are valid." rule="J1|J2|J3|J4|J5"/>
<rule language="JavaScript" name="Netscape only" description="Only Javascript elements defined in any version of Netscape are valid." rule="NN2|NN3|NN4"/>
<rule language="JavaScript" name="Cross browser" description="Only Javascript elements defined in both JScript and Netscape are valid" rule="(J1|J2|J3|J4|J5)&(NN2|NN3|NN4)"/>
<rule language="VBScript" name="All" description="All defined VBScript objects, keywords etc. are valid." rule="ANY"/>
<rule language="VBScript" name="VBScript v1 only" description="Only objects defined in VBScript v1 are valid." rule="VB1"/>
<rule language="VBScript" name="VBScript v1 and v2" description="Objects defined in VBScript v1 or v2 are valid." rule="VB1|VB2"/>
<rule language="VBScript" name="VBScript v1, 2 and 3" description="Objects defined in VBScript v1, v2 or v3 are valid." rule="VB1|VB2|VB3"/>
<rule language="VBScript" name="VBScript v1 to v4" description="Objects defined in VBScript v1 to v4 are valid." rule="VB1|VB2|VB3|VB4"/>
<rule language="PHP" name="All" description="All defined PHP syntax and functions are valid." rule="ANY"/>
<!--
<rule language="PHP" name="PHP v3" description="Only PHP3 syntax and functions are valid." rule="PHP3"/>
<rule language="PHP" name="PHP v4" description="Only PHP4 syntax and functions are valid." rule="PHP4"/>