Indexing XML docs

Hi,
I am trying to index an xml document that we store in a clob. From my understanding of th XML_SECTION_GROUP, I would like to use that, but I am having some trouble. I use the following method:
create index indx_im_appl_document
on application(document)
indextype is ctxsys.context
parameters('filter CTXSYS.NULL_FILTER section group CTXSYS.XML_SECTION_GROUP')
Now, whether or not I tack that CTXSYS in front of XML_SECTION_GROUP, I get the error:
ORA-29855: error occurred in the execution of ODCIINDEXCREATE routine
ORA-20000: interMedia Text error:
DRG-12203: section group XML_SECTION_GROUP does not exist
ORA-06512: at "CTXSYS.DRUE", line 126
ORA-06512: at "CTXSYS.TEXTINDEXMETHODS", line 54
ORA-06512: at line 1
What am I doing wrong here? (Without the section group part of paramters, it works.)
Many thanks,
Amy Schmieder
[email protected]
null

There is no section group named XML_SECTION_GROUP. One is not created by default at install time, because the user (you) have to determine which sections you want indexed. Do either of the following:
1. specify CTXSYS.AUTO_SECTION_GROUP in the parameters clause -- this section group is created at install time
2. as ctxsys, do:
exec ctx_ddl.create_section_group('XML_SECTION_GROUP','XML_SECTION_GROUP')
this creates a section group named XML_SECTION_GROUP of type XML_SECTION_GROUP

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