XML context search with escape characters

Question

Hi,
I have a piece of XML in an XMLTYPE column which is context indexed. The xml looks like
<content>
<EndDate/>
<Councillor>Smith John</Councillor>
<Committee>Inspection Leader's Advisory Body </Committee>
<StartDate/>
<LinkType>Committee Link</LinkType>
<Text/>
</content>
My query which escapes the search field between {} is
select xmlType.getStringVal(xmlType.extract(CI.CONTENT_XML,'/content/Committee/text()')) Committee
from CMPS.CM$CONTENT_ITEMS CI
where CONTAINS(content_xml,'{Inspection&a} INPATH(/content/Committee)') > 0
returns the row successfully
However
select xmlType.getStringVal(xmlType.extract(CI.CONTENT_XML,'/content/Committee/text()')) Committee
from CMPS.CM$CONTENT_ITEMS CI
where CONTAINS(content_xml,'{Inspection&am} INPATH(/content/Committee)') > 0
--Note the extra character in between {}
does not return anything.
Can someone tell me if I am escaping the reserved characters correctly?
Is there something that I missed when I created my index i.e
CREATE INDEX CIM_CONTEXT ON
cm$content_items(content_xml) indextype is ctxsys.context;
I am running 9.2.0.4 on RED HAT 3.
Thanks
Joel.

Answer 1

From the text team...
The default section group for XMLType column is path section group.
As for his question, the reason why he gets a hit for the first query:
{Inspection&a} INPATH(/content/Committee), is because {Inspenction&a} is lexed as
a phrase "Inspection a" and a by default is 'a' stop word.
And {Inspection&am} is lexed as a phrase "Inspection am". Since there is no such phrase ("am" is not a stop word), the query does not return the row.
If he tries {Inspection&an}, he will get the row because "an" is again by default a stop word.
The behavior is independent of INPATH operator. He will see the same behavior without INPATH operator:
select * from CMPS.CM$CONTENT_ITEMS CI where CONTAINS(content_xml,'{Inspection&a}') > 0;
select * from CMPS.CM$CONTENT_ITEMS CI where CONTAINS(content_xml,'{Inspection&am}') > 0;
select * from CMPS.CM$CONTENT_ITEMS CI where CONTAINS(content_xml,'{Inspection&an}') > 0;
Note sure I understand it but I hope it helps