Hi All I have a question regarding PostgreSQL's full text capabilities and (presumably) the synonym dictionary.
I'm currently implementing FTS on a medical themed setup which uses domain specific jargon to denote a bunch of stuff. A specific request I wish to implement here are the jargon synonyms that are heavily used. Of course, I can simply go ahead and create my own synonym dictionary with a jargon specific synonym file to feed it. However, most of the synonyms are comprised out of more then a single word. The term "heart attack" for example has the following "synonyms": - Acute MI - MI - Myocardial infarction As far as I understand it, the tokenizer within PostgreSQL FTS engine splits words on spaces to generate tokens which are then proposed to each dictionary. I think it is therefor impossible to have "multi-word synonyms" in this sense as multiple words cannot reach the dictionary. The term "heart attack" would be presented as the tokens "heart" and "attack". >From a technical standpoint I understand FTS is about looking at individual >words and lexemizing them ... yet from a natural language lookup perspective >you still wish to tie "Heart attack" to "Acute MI" so when a client search on >one, the other will turn up as well. Should I write my own tokenizer to catch all these words and present them as a single token? Or is this completely outside the realm of FTS (or FTS within Postgresql)? Cheers, Tim -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
