Resolution of schemaLocation URIs should be via URI resolution, not entity resolution

• Key: XERCESJ-1104
• Type: Bug
• Status: Resolved
• Resolution: Won't Fix
• Priority: Major
• Assignee: Unassigned
• Reporter: William Eliot Kimber
• Component/s: XNI
• Affects Version/s: 2.6.0, 2.7.1

Description

The resolveSchema() method of XSDHandler uses the entityResolver to resolve URIs in schema location hints. This has the effect that, when using a catalog resolver that SYSTEM entries are used to resolve the schema URIs.

However, schemas are not entities and therefore their URI references should not be resolved via an entity resolver but via a URI resolver and should, therefore be resolved via URI catalog entries, not SYSTEM entries.

That is, by the OASIS Entity Resolution spec one would expect to declare URI entries to remap schema location URIs but this does not work.

I'm happy to develop a fix but it may take me a while to figure out exactly how to go about it.

Because this behavior has been around for a while (since at least version 2.6) and is documented in at least one tutorial I found, it will probably be necessary to control the use of an entityResolver or URI resolver through a system property.