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1 XOXO 1.0: Extensible Open XHTML Outlines

XOXO 1.0: Extensible Open XHTML Outlines

Experimental Specification 2004”N01ŒŽ04“ú

Authors

preamble

Name

Abstract
Background
Requirements
The XOXO Document Type

The XOXO Profile

Simple XOXO Fragment

Markup
Sample Rendering
Usage of 'compact' attribute
Possible Default Style Rules for Sample Rendering

More Examples
Normative References
Appendix A: Related Work
Appendix B: XOXO Schemas

1.1 Experimental Specification 2004”N01ŒŽ04“ú

1.1.1 Authors

[WWW]Kevin Marks [WWW]Tantek ƒkelik [WWW]Mark Pilgrim [WWW]Morten W. Petersen

1.2 preamble

When we were discussing attentionxml, Tantek pointed out that XHTML has everything necessary for semantically expressing Outlines and Blogroll-like subscriptions in an XML format that is both renderable by browsers and parsable by strict xml engines. This page is here to discuss this idea.

1.2.1 Name

XOXO stands for eXtensible Open XHTML Outlines, and is pronounced variously as 'ecks oh ecks oh' and 'Zho-zho'

1.3 Abstract

This specification defines a new XHTML document type that is based upon the module framework and modules defined in Modularization of XHTML [ [WWW]XHTMLMOD ]. The purpose of the XOXO document type is to serve as the basis for XHTML friendly outlines for processing by XML engines and for easy rendering by browsers.

1.4 Background

1.5 Requirements

1.6 The XOXO Document Type

The XOXO document type is made up of the following XHTML modules. The elements, attributes, and minimal content models associated with these modules are defined in "Modularization of XHTML" [ [WWW]XHTMLMOD ]). The elements are listed here for information purposes, but the definitions in "Modularization of XHTML" should be considered definitive. In the on-line version of this document, the module names in the list below link into the definitions of the modules within the current version of "Modularization of XHTML".

[WWW]Structure Module

body, head, html, title

[WWW]Hypertext Module

[WWW]List Module

ol, ul, li

[WWW]Metainformation Module

1.6.1 The XOXO Profile

The XOXO Profile is an [WWW]XHTML Meta Data Profile used to define values for the class attribute.

<dl class="profile"> 
 <dt>class</dt> 
 <dd><p><a rel="help" href="http://www.w3.org/TR/html401/struct/global.html#adef-class">HTML4 definition of the 'class' attribute.</a> 
 This meta data profile defines some 'class' attribute values (class names) and their meanings as suggested by a 
 <a href="http://www.w3.org/TR/WD-htmllink-970328#profile">draft of "Hypertext Links in HTML"</a>:</p> 
 <dl> 
 <dt>xoxo</dt> 
 <dd>An XOXO outline as defined by the 
 <a href="http://developers.technorati.com/wiki/xhtmloutlines">XOXO specification</a>. 
 Typically an ordered list &lt;ol&gt; or unordered list &lt;ul&gt; element.</dd> 
 <dt>blogroll</dt> 
 <dd>When used with the aforementioned 'xoxo' value, this value means 
 a particular instance of an XOXO outline which has the additional semantic of being a 
 <a href="http://www.microcontentnews.com/resources/glossary/blogrolling.htm">blogroll</a>. 
 </dd> 
 </dl> 
 </dd> 
</dl>

1.7 Simple XOXO Fragment

1.7.1 Markup

<ol class='xoxo'> 
 <li>Subject 1 
 <ol> 
 <li>subpoint a</li> 
 <li>subpoint b</li> 
 </ol> 
 </li> 
 <li>Subject 2 
 <ol compact="compact"> 
 <li>subpoint c</li> 
 <li>subpoint d</li> 
 </ol> 
 </li> 
 <li>Subject 3 
 <ol> 
 <li>subpoint e</li> 
 </ol> 
 </li> 
</ol>

1.7.2 Sample Rendering

 1. Subject 1 
 a. subpoint a 
 b. subpoint b 
 2. Subject 2 
 3. Subject 3 
 a. subpoint e

1.7.3 Usage of 'compact' attribute

Note the use of the 'compact' attribute to indicate that the subpoints of the headline "Subject 2" are not in an expanded state. The absence of the 'compact' attribute elsewhere indicates that the other headlines are in an expanded state.

Question: why is compact/expanded expressed via a new attribute and not by a style class? Wouldn't it be more compatible to simply use a style class?

1.7.4 Possible Default Style Rules for Sample Rendering

ol.xoxo { list-style:decimal; } 
ol.xoxo ol { list-style:lower-latin; } 
ol[compact="compact"] { display:none; }

1.8 More Examples

MarkP has a set of examples that demonstrates both the simplicity of the markup and the presentational richness that is possible:

1.9 Normative References

1.10 Appendix A: Related Work

1.11 Appendix B: XOXO Schemas

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