On Thursday 18 March 2010 17:47:45 Mark Fletcher wrote: > Hi, > > Thanks for the mail. I had tried the WIKI. > > My doubts remaining were mainly:- > > 1. > If we have synonyms specified and they replace your search keyword with the > ones specified wouldn't we face a risk of our original keyword missed out. > What i meant is if I have a keyword for search say "agriculture" and I > replace it with some synonyms, will I never again be able to search > directly for "agriculture". ie suppose I have a document which has the > term agriculture and none of the synonyms in it. Will that document be > retrieved when i search for agriculture as I have now mapped it to other > terms.
It depends whether you let them be replaced. If you omit the => sign, the terms simlpy will be expanded to whatever synonyms you specified. I could not explain it any better than the wiki. > 2. > I am still a bit confused about the interpretation of:- > a\=>a => b\=>b > > a\,a => b\,b > > abc def rose\, my cap , rose flower > > Can you pls give a one linere explanation for the above. There are some > sample entries in the synonyms.txt This is escaping otherwise meaningful characters. The , and => are meaninful to the SynonymFilterFactory and therefore need to be escaped as you also would escape certain characters in any language or whatever. You need to escape qoutes in many languages and you must escape the : sign a.o. in you Lucene queries. > 3. If I get some help me with the above 3 it will help me understand the backslash "\" also better. > Thanks, > Mark. > > > On Thu, Mar 18, 2010 at 12:19 PM, Markus Jelsma <mar...@buyways.nl> wrote: > Hi, > > > Check out the wiki page on the SynonymFilterFactory. It gives a decent > explantion on the subject. The backslash is just for escaping otherwise > meaningful characters. > > > [1]:http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#solr.Synony > mFilterFactory > > > Cheers, > > On Thursday 18 March 2010 17:10:56 Mark Fletcher wrote: > > Hi, > > > > Just needed some help to understand the following synonym mappings:- > > > > 1. aaa => aaaa > > does it mean:- > > if the user queries for aaa it is replaced with aaaa and > > documents matching aaaa are searched for > > or does it mean > > if the user queries for aaa, documents with aaa as well as aaaa > > are looked for > > > > > > 2. bbb => bbbb1 bbbb2 > > does it mean that if the user queries for bbb, SOLR will look for > > documents that contain bbbb1 bbbb2 > > > > > > 3. ccc => cccc1,cccc2 > > does it mean that if the user queries for ccc, SOLR will look for > > documents that contain cccc1 or cccc2 > > > > 4. a\=>a => b\=>b > > First of all my doubt is what does the "\" do there. Does it > > have any special significance. > > Can someone help me interpret the above > > > > 5. a\,a => b\,b > > Can some one help me with this also > > > > 6. fooaaa,baraaa,bazaaa > > does this mean that if any of fooaaa or baraaa or bazaaa > > comes as the search keyword, SOLR will look for documents that contain > > fooaaa > > > > 7. abc def rose\, my cap , rose flower > > > > > does this mean a query for any of the above 3 will always be > > replaced by a query for abc def rose\ > > > > Can some one pls extend some help at your earliest convenience. > > > > Thank you. > > Mark. > > Markus Jelsma - Technisch Architect - Buyways BV > http://www.linkedin.com/in/markus17 > 050-8536620 / 06-50258350 > Markus Jelsma - Technisch Architect - Buyways BV http://www.linkedin.com/in/markus17 050-8536620 / 06-50258350
