ABOUT query not affecting results or not using knowledge base

Question

Hello again,
Another question here,
I've searched through the forum and have found other
posts on the same problem but no solutions, though
the problem isn't always the primary topic of the
forum. I've put this post up to hopefully put this
to rest as I'm pretty sure this is just a
configuration issue.
I am using an ABOUT operator in a CONTAINS query and
the query seems to return the same results as the
same query without the about operator, eg:
SELECT SCORE(0) AS scr,
file_repository.file_id,
file_repository.file_title
FROM file_repository
WHERE CONTAINS(index_url, 'ABOUT(australia)', 0) > 0
versus
SELECT SCORE(0) AS scr,
file_repository.file_id,
file_repository.file_title
FROM file_repository
WHERE CONTAINS(index_url, 'australia', 0) > 0
I have included documents based on the default
knowledge base should be found. For example I have
three documents, one containing the term 'Tasmania'
another containing 'Australia' and a third with
'Pacific Area'. The first query above should return
all three of these documents, but it only returns
the one containing 'Australia'.
I have used other examples from the default knowledge
base and have had no success. I have not attempted to
extend the knowledge base with a thesaurus as, from
what I can tell, I shouldn't need to do this for it
to work.
Any help would be much appreciated.

Answer 1

Hello.
Did you load the supplied english thesaurus as your DEFAULT thesaurus using the command line utility ctxload (or some other method)?
I had the same experience until I loaded the sample thesaurus in $ORACLE_HOME/ctx/sample/thes/. Now my ABOUT and SYN queries work as expected though I still have a concern about the incomplete nature of the sample thesauri (I'll open a new thread on that topic).
Hope this helps.