Adding schema and namespace attributes with XMLFormat

[ilnoca]

I'm generating an XML doc to be stored as a CLOB using the sys_xmlagg function. I've been able to make a valid XML doc, but I can't figure out how to assign schema and namespace attributes to the enclosing tag using xmlformat.Createformat. Right now I have the code as:

sys_xmlagg(
....
,xmlformat.Createformat('ORU_R01')).getCLOBVal()

When I try to add schema info I error out on execution:

sys_xmlagg(
....
,xmlformat.Createformat('ORU_R01', 'USE_GIVEN_SCHEMA','messages.xsd','[URL unfurl="true"]http://www.w3.org/2001/XMLSchema-instance','urn:hl7-org:v2xml')).getCLOBVal()[/URL]

The message I receive is Resource "'messages.xsd' is not an XDB schema document."

Since I'm adding an attribute I don't think I need to register the schema, but this is entirely new to me.

If it helps, the way I want to build the tag is:

<hl7:ORU_R01 xsi:schemaLocation="urn:hl7-org:v2xml messages.xsd" xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"

xmlns:hl7="urn:hl7-org:v2xml">

Thanks.