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XSD Parser, XML Parsers doesn't work because XSD can be written different ways

Pratap koritala
Ranch Hand

Joined: Sep 27, 2006
Posts: 252
I want to find the root Type of the XSD ( You know the root node of the corresponding XML, But I don't have it's XML, just XSD)
I need to identify the root type, The normal XML ( XSD also a type of XML) doesn't work simply because you can write same XSD in different ways.
http://www.w3schools.com/schema/schema_example.asp


I tried XSOM, Apache XMLBeans ( There is a bug in programatically loading the xsd in it) and http://ws.apache.org/commons/xmlschema20/
But, nothing seems to work for above.

It is not that it cannot be done, But I don't want to reinvent this wheel.
Any help would be highly appreciated.

Chris Gage
Greenhorn

Joined: Mar 23, 2005
Posts: 17

I have been looking at a few of mine, and I think if you only have the XSD you may have to go back to basics -- the root tag has no REQUIRED identifying mark -- it is the only element tag that is neither a simple element nor contained within another complex element.

So use old-fashioned W3C DOM and parse your XSD as normal XML, then walk the tree and build a Map of all the element names, then walk the tree again and delete from the map:

-- all simple elements
-- all elements that occur inside another element.

You should be left with one element in your Map ...
 
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subject: XSD Parser, XML Parsers doesn't work because XSD can be written different ways