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HTML tags and tsearch2

From: Joanna Sharman <Joanna(dot)Sharman(at)ed(dot)ac(dot)uk>
To: pgsql-general(at)postgresql(dot)org
Subject: HTML tags and tsearch2
Date: 2008-06-26 11:11:58
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-general

I have recently started experimenting with tsearch2 and it seems that  
the default behaviour is to ignore HTML tags and treat them as  
word-separators. What I would like it to do is to ignore HTML tags  
within words, but instead of creating separate words, combine the  
characters separated by the tag into one word.

For example: in the database I have words like 'K<sub>ir</sub>' that  
need to be searched using the term without HTML tags, i.e. 'Kir'.  
Currently, the HTML tags are ignored and two words are stored in the  
vector, 'k' and 'ir'. I would like only one word, 'kir', to be stored  
in the vector, so that searches using the word 'kir' will match the row.

A second, related question is whether it is possible to cause tsearch2  
to split up words when it encounters digits, e.g. 'TM8' into 'TM' and  

I am not sure if this functionality is possible to implement using  
tsearch2 or if there might be a better way, so I would be grateful for  
any advice or pointers to further reading on how I might do this. (I  
am using PostgreSQL version 8.1.10)

Many thanks in advance,

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.


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Subject: Re: HTML tags and tsearch2
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