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<title>Simple XML/title>
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<h1>Simple XML</h1>

<p>This simplified version on XML is a variant of the proposed <a
href="/pub/WWW/TR/WD-xml">XML language</a>. It removes some features
and adds a few others. It mainly differs from XML in these aspects:</p>


<li><p>Seperation between lexical part and grammar part means that is
much easier to parse. The grammar has just 16 productions and is

<li><p>There is no distinction between &#60;;foo&#62;&#60;/foo&#62; and
&#60;foo/&#62;, they can be used interchangeably.</p></li>

<li><p>Documents can be nested: there may be &#60;!doctype&#62;
declarations in the middle of a document.</p></li>

<li><p>Default attribute declarations are scoped: they are valid until
the end of the current element or doctype.</p></li>

<li><p>Whitespace handling is simplified: a newline immediately before a `&#60;'
and a newline immediately after a `&#62;' are ignored; no other
whitespace is ignored by the parser (i.e., all other whitespace is
passed on to the application).</p></li>

<li><p>Only character entities are allowed, no other types of entities

<li><p>There is no internal document type subset. The allowed
structure of the document can only be specified in a separate



<p>A few examples of XML files:</p>


<li><p><a href="example1.html">A document</a> with all the information
in the attributes.</p></li>

<li><p><a href="example2.html">The current document</a> in XML syntax.</p></li>


<p>I'm still working on a replacement for the DTD syntax, that would
allow content models and attribute sets for elements to differ based
on context. It would basically be an EBNF variant, with a few handy
abbreviations for common constructs like start tags and end tags.</p>

<address><a href="mailto:bert@w3.org">Bert Bos</a></address>
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Note that there isn't much difference between the HTML and XML versions.

Bert Bos

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