44 lines
1.6 KiB
HTML
44 lines
1.6 KiB
HTML
|
<HTML>
|
||
|
|
<TITLE>Canonical XML</TITLE>
|
||
|
|
<BODY>
|
||
|
|
<H1>Canonical XML</H1>
|
||
|
|
<P>
|
||
|
|
This document defines a subset of XML called canonical XML.
|
||
|
|
The intended use of canonical XML is in testing XML processors,
|
||
|
|
as a representation of the result of parsing an XML document.
|
||
|
|
<P>
|
||
|
|
Every well-formed XML document has a unique structurally equivalent
|
||
|
|
canonical XML document. Two structurally equivalent XML
|
||
|
|
documents have a byte-for-byte identical canonical XML document.
|
||
|
|
Canonicalizing an XML document requires only information that an XML
|
||
|
|
processor is required to make available to an application.
|
||
|
|
<P>
|
||
|
|
A canonical XML document conforms to the following grammar:
|
||
|
|
<PRE>
|
||
|
|
CanonXML ::= Pi* element Pi*
|
||
|
|
element ::= Stag (Datachar | Pi | element)* Etag
|
||
|
|
Stag ::= '<' Name Atts '>'
|
||
|
|
Etag ::= '</' Name '>'
|
||
|
|
Pi ::= '<?' Name ' ' (((Char - S) Char*)? - (Char* '?>' Char*)) '?>'
|
||
|
|
Atts ::= (' ' Name '=' '"' Datachar* '"')*
|
||
|
|
Datachar ::= '&amp;' | '&lt;' | '&gt;' | '&quot;'
|
||
|
|
| '&#9;'| '&#10;'| '&#13;'
|
||
|
|
| (Char - ('&' | '<' | '>' | '"' | #x9 | #xA | #xD))
|
||
|
|
Name ::= (see XML spec)
|
||
|
|
Char ::= (see XML spec)
|
||
|
|
S ::= (see XML spec)
|
||
|
|
</PRE>
|
||
|
|
<P>
|
||
|
|
Attributes are in lexicographical order (in Unicode bit order).
|
||
|
|
<P>
|
||
|
|
A canonical XML document is encoded in UTF-8.
|
||
|
|
<P>
|
||
|
|
Ignorable white space is considered significant and is treated equivalently
|
||
|
|
to data.
|
||
|
|
<P>
|
||
|
|
<ADDRESS>
|
||
|
|
<A HREF="mailto:jjc@jclark.com">James Clark</A>
|
||
|
|
</ADDRESS>
|
||
|
|
|
||
|
|
</BODY>
|
||
|
|
</HTML>
|