First, if you turn off the "verbose" checkbox, it'll reduce a lot of the clutter. The important point is that when you hover over those abbreviations, it tells you exactly what class did the associated transformation the analysis chain on the tokens. You'll note that StandardTokenizer breaks the input up into tokens. "united" doesn't to very much that's exciting, make some letters uppercase and you'll see the obvious for lowercaseFilter.
Why do you suppose lemmatization will be done for text_general? There's nothing in the analysis chain that would perform any lemmatization. StandartTokenizerFactory will break the input up into tokens. Each token is then sent through filter where: StopFilterfactory will remove stopwords defined in stopwrods.txt LowercaseFilterFactory will lowercase the token that's all you've told Solr to do with the inptu at index time. And at query time SynonymFilterFactory will substitute synonyms. There's nothing here that has anything to do with lemmatization. Here's a partial list of available filters that you can choose from: https://cwiki.apache.org/confluence/display/solr/Filter+Descriptions Best, Erick On Thu, Aug 10, 2017 at 11:33 AM, OTH <omer.t....@gmail.com> wrote: > Hi, > > Regarding 'analysis chain': > > I'm using Solr 6.4.1, and in the managed-schema file, I find the following: > <fieldType name="text_general" class="solr.TextField" > positionIncrementGap="100" multiValued="true"> > <analyzer type="index"> > <tokenizer class="solr.StandardTokenizerFactory"/> > <filter class="solr.StopFilterFactory" words="stopwords.txt" > ignoreCase="true"/> > <filter class="solr.LowerCaseFilterFactory"/> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.StandardTokenizerFactory"/> > <filter class="solr.StopFilterFactory" words="stopwords.txt" > ignoreCase="true"/> > <filter class="solr.SynonymFilterFactory" expand="true" > ignoreCase="true" synonyms="synonyms.txt"/> > <filter class="solr.LowerCaseFilterFactory"/> > </analyzer> > </fieldType> > > > Regarding the Admin UI >> Analysis page: I just tried that, and to be > honest, I can't seem to get much useful info out of it, especially in terms > of lemmatization. > > For example, for any text I enter in it to "analyse", all it does is seem > to tell me which analysers (if that's the right term?) are being used for > the selected field / fieldtype, and for each of these analyzers, it would > give some very basic info, like text, raw_bytes, etc. Eg, for the input > "united" in the "field value (index)" box, having "text_general" selected > for fieldtype, all I get is this: > > ST > text > raw_bytes > start > end > positionLength > type > position > united > [75 6e 69 74 65 64] > 0 > 6 > 1 > <ALPHANUM> > 1 > SF > text > raw_bytes > start > end > positionLength > type > position > united > [75 6e 69 74 65 64] > 0 > 6 > 1 > <ALPHANUM> > 1 > LCF > text > raw_bytes > start > end > positionLength > type > position > united > [75 6e 69 74 65 64] > 0 > 6 > 1 > <ALPHANUM> > 1 > Placing the mouse cursor on "ST", "SF", or "LCF" shows a tooltip saying > "org.apache.lucene.analysis.standard.StandardTokenizer", > "org...core.StopFilter", and "org...core.LowerCaseFilter", respectively. > > > So - should 'states' not be lemmatized to 'state' using these settings? > (If not, then I would need to figure out how to use a different lemmatizer) > > Thanks > > On Thu, Aug 10, 2017 at 10:28 PM, Erick Erickson <erickerick...@gmail.com> > wrote: > >> saying the field is "text_general" is not sufficient, please post the >> analysis chain defined in your schema. >> >> Also the admin UI>>analysis page will help you figure out exactly what >> part of the analysis chain does what. >> >> Best, >> Erick >> >> On Thu, Aug 10, 2017 at 8:37 AM, OTH <omer.t....@gmail.com> wrote: >> > Hello, >> > >> > It seems for me that the token "states" is not getting lemmatized to >> > "state" by Solr. >> > >> > Eg, I have a document with the value "united states of america". >> > This document is not returned when the following query is issued: >> > q=name:state^1+name:america^1+name:united^1 >> > However, all documents which contain the token "state" are indeed >> returned, >> > with the above query. >> > The "united states of america" document is returned if I change "state" >> in >> > the query to "states"; so: >> > q=name:states^1+name:america^1+name:united^1 >> > >> > At first I thought maybe the lemmatization isn't working for some reason. >> > However, when I changed "united" in the query to "unite", then it did >> still >> > return the "united states of america" document: >> > q=name:states^1+name:america^1+name:unite^1 >> > Which means that the lemmatization is working for the token "united", but >> > not for the token "states". >> > >> > The "name" field above is defined as "text_general". >> > >> > So it seems to me, that perhaps the default Solr lemmatizer does not >> > lemmatize "states" to "state"? >> > Can anyone confirm if this is indeed the expected behaviour? >> > And what can I do to change it? >> > If I need to put in a customer lemmatizer, then what would be the (best) >> > way to do that? >> > >> > Much thanks >> > Omer >>
