- From: Eddie Robertsson <erobertsson@allette.com.au>
- Date: Wed, 27 Mar 2002 10:41:11 +1100
- To: John Utz <utz@singingfish.com>
- CC: xmlschema-dev@w3.org
Hi John, > the author of foo.xsd believes that the import namespace line in foo.xsd > should be sufficient for the namespace aware parts of foobar-2001.xsd > and bazbar-2001.xsd to be resolved. > > this is a quote from this person: > > * I don't understand why the insertion of the import to every > sub-schema is the right implementation without a construct > such as "#ifdef" in C++ to avoid collisions. > > the current version of xerces2-j disagrees with him alot. :-) > > it gets very unhappy and spews zillions of namespace based errors if i > dont put the import namespace line into each included schema. > > this is a recent feature of xerces, and when i asked about it on the > xerces-j list it was asserted that this was the correct behavior. > > i believe that the xerces gang is correct. but i am unsure, so i am asking > on this list because i feel like i'll get an authoritative answer. > > i really need an authoritative answer because this is just about the very > last step before this major new xsd based specification goes out the door > and i only want to reply to this important person once with a > correct, succinct, answer. > > a pointer to the place in the spec that calls this behavior out would be > wonderful. Xerces2-j is indeed correct here. The place in the spec where this is specified is at [1]. Point 4 says: "4 its ·namespace name· is either the target namespace of the schema document containing the ·QName· or that schema document contains an <import> element information item the ·actual value· of whose namespace [attribute] is identical to that ·namespace name·." This means that to allow references in schema documents foobar-2001.xsd and bazbar-2001.xsd to components defined in schema documents with different namespaces, schema documents foobar-2001.xsd and bazbar-2001.xsd must import these documents explicitly. See [2] for more information about this. Cheers, /Eddie [1] http://www.w3.org/TR/xmlschema-1/#src-resolve [2] http://lists.w3.org/Archives/Public/xmlschema-dev/2002Jan/0186.html
Received on Tuesday, 26 March 2002 18:28:56 UTC