The previous article in this series discussed the DOM API for XML data access in the . It models an XML document as a tree of nodes kept in memory while a client is using the document.
The top part of Figure 1 shows how the DOM parser produces a tree of nodes.
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This is simpler, IMHO and works for relative file locations and didn't take 10 minutes to write.
When you request an embedded resource you need to ask for the file using the original file name as well as the namespace.The client access methods allow forward and backward movement, much like the client-side, static cursor in ADO data access on the Microsoft platform.The cost of this type of capability is the resource requirements needed to keep each node in memory. The SAX API was one of the first attempts in the XML community to solve the problem of parsing large XML documents.Schemas may reference other schemas like this: In this, and most, cases schema Location refers to a relative file.However it could refer to a URL, or some custom scheme.
Unless these schemas were explicitly added to the schema collection, they will not be accessible using any of the collection methods or properties.