Index rules in oracle text and query using matches

Question

Dear All,
I would like to ask about rules and matches function in oracle text.
I followed an example in oracle text application developer's guide.
I have a rule table like this :
1 oracle
2 larry or ellison
3 oracle and text
4 market share
then, I create an index to that table. This is needed for calling matches function. Here is the syntax :
create index queryx on queries(query_string)
indextype is ctxsys.ctxrule;
then, I noticed that the result on DR$QUERYX$I table as follows :
LARRY 0 2 2 1 (BLOB)
MARKET 0 4 4 1 (BLOB) {MARKET} {SHARE}
ORACLE 0 1 1 1 (BLOB)
ORACLE 0 3 3 1 (BLOB) {TEXT}
ELLISON 0 2 2 1 (BLOB)
What I want to ask is why doesn't the words 'share' and 'text' appear in the DR$QUERYX$ table?
When we use matches function, it then search on the index result and consequently it wion't find the 'share' word. so when for example I do query like this :
select query_id from queries where matches(query_string,' It only share ten percent of all products sold')>0
it will give 0 result since the no word in ' It only share ten percent of all products sold' was in index table. But actually it could possibly be categorized as the 4 category which rules is 'market share'
I tried this in a larger set of data and get same result.
Here is my generated rules from my document collection :
1 {REQUIREMENTS} & {ELICITATION}
1 {REQUIREMENTS} ~ {ELICITATION} & {ACTOR}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} & {FURPS}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} & {PROC}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} & {SPEED}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} ~ {SPEED} & {DOCUME}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} ~ {SPEED} ~ {DOCUME} & {PLACED}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} ~ {SPEED} ~ {DOCUME} ~ {PLACED} & {UNNECESSARY}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} ~ {SPEED} ~ {DOCUME} ~ {PLACED} ~ {UNNECESSARY} & {MISUSE}
1 {INTERPRETATION} ~ {REQUIREMENTS}
2 {DESIGN} & {REPRESENTATION}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} & {OCTOBER}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} ~ {OCTOBER} & {PROCEDURAL}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} ~ {OCTOBER} ~ {PROCEDURAL} & {STRICT}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} ~ {OCTOBER} ~ {PROCEDURAL} ~ {STRICT} & {GRASP}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} ~ {OCTOBER} ~ {PROCEDURAL} ~ {STRICT} ~ {GRASP} & {MANY} & {LAYER}
2 {DESIGN} ~ {REPRESENTATION} ~ {MAY}
3 {PM} & {TESTING} & {ATTRIBUTI}
And this is the index table result with ctxrule :
(only the token_text column shown)
PM
DESIGN
DESIGN
DESIGN
DESIGN
DESIGN
DESIGN
DESIGN
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
INTERPRETATION
so when I try to classify a document with the word ouline inside it, it should produce category 1 (based on the rules) but since there are no word 'outline' in index tabel, the matches will return 0 means that the document is not classifiedto any category. I don't understand why it happen. Anybody knows about this? I would really appreciate any help.
Thank you very much.

Answer 1

Hm, I see. It do make sense. so nice to know.
But then in the second example I gift where I used larger table, as shown below :
Here is my generated rules from my document collection :
1 {REQUIREMENTS} & {ELICITATION}
1 {REQUIREMENTS} ~ {ELICITATION} & {ACTOR}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} & {FURPS}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} & {PROC}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} & {SPEED}
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE} ~ {PROC} ~ {SPEED} & {DOCUME}
1 {INTERPRETATION} ~ {REQUIREMENTS}
2 {DESIGN} & {REPRESENTATION}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} & {OCTOBER}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} ~ {OCTOBER} & {PROCEDURAL}
2 {DESIGN} ~ {REPRESENTATION} & {MAY} & {FOUNDATI} ~ {OCTOBER} ~ {PROCEDURAL} & {STRICT}
2 {DESIGN} ~ {REPRESENTATION} ~ {MAY}
3 {PM} & {TESTING} & {ATTRIBUTI}
As far as I know, the sign ' ~ ' means 'OR' and '&' means 'and' . So based on the 4th line in my table :
1 {REQUIREMENTS} ~ {ELICITATION} ~ {ACTOR} ~ {FURPS} ~ {OUTLINE}
it can be concluded that if any of the words stated there been queried, so the category '1' will appear as a result. But then before we can use 'matches' to query it, we need ti create index for the rules table . I did it and the result were :
(only the token_text column shown)
PM
DESIGN
DESIGN
DESIGN
DESIGN
DESIGN
DESIGN
DESIGN
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
REQUIREMENTS
INTERPRETATION
there were no words other than PM, DESIGN< REQUIREMENTS and INTERPRETATION. Why the words REQUIREMENTS, ELICITATION, ACTOR, FURPS, OUTLINE don't appear in the index result?