> From: Rita Shen [mailto:]
> Hi,
>
> How can I generate a common XML schema for multiple xml instances??
> I know many tools can generate an XSD from a single XML instance.
> But in my case, I want to get the unknown common XSD for a bunch of XML
> instances.
Probably not what you want, but it is pretty easy to generate a "usage
schema" for Schematron.
You
1) extract every simple XPath in all the documents, one per line, eg
/book
/book/section
/book/section/heading
2) run this through sort -ur (if you are not running in UNIX, you can
download the free GNU utility) to get a reverse unique sort of the
lines.
3) for each line, generate a Schematron rule with the line as the
context and an <assert context="true()" /> assertion and a fallthrough
case. Eg
<pattern>
<rule context="">
<assert test="/book/section/heading" />
<assert test="/book/section" />
<assert test="/book" />
<assert test="*" />Only the elements in the test documents can be
used.</assert>
</rule>
</pattern>
There are other varieties of things you could test. For example just each
element with no ancestor paths, or just parent/child pairs.
Cheers
Rick Jelliffe
