You are viewing a plain text version of this content. The canonical link for it is here.
Posted to solr-user@lucene.apache.org by Raf <r....@gmail.com> on 2016/09/27 14:10:56 UTC
Configuring a custom Analyzer for the SynonymFilter
Hi,
is it possible to configure a custom analysis for synonyms the same way we
do for index/query field analysis?
Reading the *SynonymFilter* documentation[0], I have found I can specify a
custom analyzer by writing its class name.
Example:
<fieldType name="myField_it" class="solr.TextField" >
<analyzer>
<tokenizer class="MyTokenizer" />
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="MyFilter_1" />
<filter class="MyFilter_2" />
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
ignoreCase="true" expand="true"
analyzer="org.apache.lucene.analysis.it.ItalianAnalyzer"/>
</analyzer>
</fieldType>
What I would like to achieve, instead, it is something like this:
<fieldType name="myField_it" class="solr.TextField">
<analyzer>
<tokenizer class="MyTokenizer" />
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="MyFilter_1" />
<filter class="MyFilter_2" />
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
ignoreCase="true" expand="true">
<analyzer>
<tokenizer class="MyTokenizer" />
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="MyFilter_1" />
</analyzer>
</filter>
</analyzer>
</fieldType>
I have tried to configure it this way, but it does not work.
I do not get any configuration error, but the custom analyzer is not
applied to synonyms.
Is it possible to achieve this result by configuration or am I forced to
write a custom Analyzer class?
I am currently using Solr 5.2.1.
At the moment I cannot upgrade to a newer version.
Thank you very much for any help you can provide.
Regards,
*Raf*
[0]
http://archive.apache.org/dist/lucene/solr/ref-guide/apache-solr-ref-guide-5.2.pdf
p. 132
Re: Configuring a custom Analyzer for the SynonymFilter
Posted by Raf <r....@gmail.com>.
Just to bring up to a conclusion, I have finally solved my issue by
creating a custom Analyzer for use with the SynonymFilter.
It is not as "declarative" as I would have hoped, but at least it works :)
Greetings,
*Raf*
On Wed, Sep 28, 2016 at 9:26 AM, Raf <r....@gmail.com> wrote:
> On Wed, Sep 28, 2016 at 3:21 AM, Alexandre Rafalovitch <arafalov@gmail.com
> > wrote:
>
>> Before you go down this rabbit hole, are you actually sure this does
>> what you think it does?
>>
>> As far as I can tell, that parameter is for analyzing/parsing the
>> synonym entries in the synonym file. Not the incoming search queries
>> or text actually being indexed.
>
>
>
> Yes, this is exactly what I am looking for.
>
> I have already customized my indexing and query analyzer for that field,
> by using a custom filter that performs lemmatization for the Italian
> language.
> Hence, the token I have in my index (or in the parsed query) are something
> like evento_n (event -> noun) or mangiare_v (eat -> verb).
>
> Now I would like to define synonyms without having to know the "lemma"
> form.
>
> For example, I would like to have in my synonyms file:
> evento,festa,spettacolo
> and make the *SynonymFilter* analyzer transform them in
> *evento_n,festa_n,spettacolo_n*
>
> This way, a query like *myField:spettacoli* (the plural form of
> *spettacolo*) would be analyzed as *myField:(spettacolo_n evento_n
> festa_n)*.
>
>
>
>> Did you get it to work with the simpler configuration?
>>
>
> Yes, I carried out an experiment using the standard Lucene ItalianAnalyzer
> class (both at indexing and query time and for the SynonymFilter) and it
> works the way I was expecting. Unfortunately I cannot use this analyzer
> because I have to apply my custom lemmatization filter.
>
> Therefore, I am confident I can achieve my desired result by defining a
> custom Analyzer class, but I would have preferred to be able to alter the
> filter chain just modifying the *schema.xml* file.
>
> Is there an alternative way to achieve the same result I am not seeing?
>
> Thank you very much for your help.
>
>
> Bye,
> *Raf*
>
>
>
>>
>> Just double checking.
>>
>> Regards,
>> Alex.
>> ----
>> Newsletter and resources for Solr beginners and intermediates:
>> http://www.solr-start.com/
>>
>>
>> On 27 September 2016 at 22:45, Raf <r....@gmail.com> wrote:
>> > On Tue, Sep 27, 2016 at 4:22 PM, Alexandre Rafalovitch <
>> arafalov@gmail.com>
>> > wrote:
>> >
>> >> Looking at the code (on GitHub is easiest), it can take either
>> >> analyzer or tokenizer but definitely not any chain definitions. This
>> >> seems to be the same all the way to 6.2.1.
>> >>
>> >
>> > Thanks for your answer Alex.
>> >
>> > Does anyone know if it exists a viable alternative to make it
>> configurable
>> > inside the schema.xml instead of defining a custom Java class?
>> >
>> > I was thinking about something like:
>> >
>> > * defining the *analyzer* outside of the *field* element, giving it a
>> name:
>> > <analyzer name="myAnalyzer">
>> > <tokenizer class="MyTokenizer" />
>> > <filter class="solr.LowerCaseFilterFactory"/>
>> > <filter class="MyFilter_1" />
>> > </analyzer>
>> >
>> > * referring to it inside the *SynonymFilter* definition by its name:
>> > <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
>> > ignoreCase="true" expand="true" analyzer="myAnalyzer"/>
>> >
>> > Unfortunately I have not found anything like this inside the Solr
>> > documentation.
>> > Is it possible to achieve something like that or the only solution is
>> > writing a custom Java class for each combination filter I need to use
>> for
>> > synonyms analysis?
>> >
>> > Thanks.
>> >
>> > Bye,
>> > *Raffaella*
>> >
>> >
>> > ----
>> >> Newsletter and resources for Solr beginners and intermediates:
>> >> http://www.solr-start.com/
>> >>
>> >>
>> >> On 27 September 2016 at 21:10, Raf <r....@gmail.com> wrote:
>> >> > Hi,
>> >> > is it possible to configure a custom analysis for synonyms the same
>> way
>> >> we
>> >> > do for index/query field analysis?
>> >> >
>> >> > Reading the *SynonymFilter* documentation[0], I have found I can
>> specify
>> >> a
>> >> > custom analyzer by writing its class name.
>> >> >
>> >> > Example:
>> >> > <fieldType name="myField_it" class="solr.TextField" >
>> >> > <analyzer>
>> >> > <tokenizer class="MyTokenizer" />
>> >> > <filter class="solr.LowerCaseFilterFactory"/>
>> >> > <filter class="MyFilter_1" />
>> >> > <filter class="MyFilter_2" />
>> >> > <filter class="solr.SynonymFilterFactory"
>> >> synonyms="synonyms.txt"
>> >> > ignoreCase="true" expand="true"
>> >> > analyzer="org.apache.lucene.analysis.it.ItalianAnalyzer"/>
>> >> > </analyzer>
>> >> > </fieldType>
>> >> >
>> >> >
>> >> > What I would like to achieve, instead, it is something like this:
>> >> > <fieldType name="myField_it" class="solr.TextField">
>> >> > <analyzer>
>> >> > <tokenizer class="MyTokenizer" />
>> >> > <filter class="solr.LowerCaseFilterFactory"/>
>> >> > <filter class="MyFilter_1" />
>> >> > <filter class="MyFilter_2" />
>> >> > <filter class="solr.SynonymFilterFactory"
>> >> synonyms="synonyms.txt"
>> >> > ignoreCase="true" expand="true">
>> >> > <analyzer>
>> >> > <tokenizer class="MyTokenizer" />
>> >> > <filter class="solr.LowerCaseFilterFactory"/>
>> >> > <filter class="MyFilter_1" />
>> >> > </analyzer>
>> >> > </filter>
>> >> > </analyzer>
>> >> > </fieldType>
>> >> >
>> >> >
>> >> > I have tried to configure it this way, but it does not work.
>> >> > I do not get any configuration error, but the custom analyzer is not
>> >> > applied to synonyms.
>> >> >
>> >> > Is it possible to achieve this result by configuration or am I
>> forced to
>> >> > write a custom Analyzer class?
>> >> >
>> >> > I am currently using Solr 5.2.1.
>> >> > At the moment I cannot upgrade to a newer version.
>> >> >
>> >> >
>> >> > Thank you very much for any help you can provide.
>> >> >
>> >> > Regards,
>> >> > *Raf*
>> >> >
>> >> >
>> >> > [0]
>> >> > http://archive.apache.org/dist/lucene/solr/ref-guide/
>> >> apache-solr-ref-guide-5.2.pdf
>> >> > p. 132
>> >>
>>
>
>
Re: Configuring a custom Analyzer for the SynonymFilter
Posted by Raf <r....@gmail.com>.
On Wed, Sep 28, 2016 at 3:21 AM, Alexandre Rafalovitch <ar...@gmail.com>
wrote:
> Before you go down this rabbit hole, are you actually sure this does
> what you think it does?
>
> As far as I can tell, that parameter is for analyzing/parsing the
> synonym entries in the synonym file. Not the incoming search queries
> or text actually being indexed.
Yes, this is exactly what I am looking for.
I have already customized my indexing and query analyzer for that field, by
using a custom filter that performs lemmatization for the Italian language.
Hence, the token I have in my index (or in the parsed query) are something
like evento_n (event -> noun) or mangiare_v (eat -> verb).
Now I would like to define synonyms without having to know the "lemma" form.
For example, I would like to have in my synonyms file:
evento,festa,spettacolo
and make the *SynonymFilter* analyzer transform them in
*evento_n,festa_n,spettacolo_n*
This way, a query like *myField:spettacoli* (the plural form of
*spettacolo*) would
be analyzed as *myField:(spettacolo_n evento_n festa_n)*.
> Did you get it to work with the simpler configuration?
>
Yes, I carried out an experiment using the standard Lucene ItalianAnalyzer
class (both at indexing and query time and for the SynonymFilter) and it
works the way I was expecting. Unfortunately I cannot use this analyzer
because I have to apply my custom lemmatization filter.
Therefore, I am confident I can achieve my desired result by defining a
custom Analyzer class, but I would have preferred to be able to alter the
filter chain just modifying the *schema.xml* file.
Is there an alternative way to achieve the same result I am not seeing?
Thank you very much for your help.
Bye,
*Raf*
>
> Just double checking.
>
> Regards,
> Alex.
> ----
> Newsletter and resources for Solr beginners and intermediates:
> http://www.solr-start.com/
>
>
> On 27 September 2016 at 22:45, Raf <r....@gmail.com> wrote:
> > On Tue, Sep 27, 2016 at 4:22 PM, Alexandre Rafalovitch <
> arafalov@gmail.com>
> > wrote:
> >
> >> Looking at the code (on GitHub is easiest), it can take either
> >> analyzer or tokenizer but definitely not any chain definitions. This
> >> seems to be the same all the way to 6.2.1.
> >>
> >
> > Thanks for your answer Alex.
> >
> > Does anyone know if it exists a viable alternative to make it
> configurable
> > inside the schema.xml instead of defining a custom Java class?
> >
> > I was thinking about something like:
> >
> > * defining the *analyzer* outside of the *field* element, giving it a
> name:
> > <analyzer name="myAnalyzer">
> > <tokenizer class="MyTokenizer" />
> > <filter class="solr.LowerCaseFilterFactory"/>
> > <filter class="MyFilter_1" />
> > </analyzer>
> >
> > * referring to it inside the *SynonymFilter* definition by its name:
> > <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
> > ignoreCase="true" expand="true" analyzer="myAnalyzer"/>
> >
> > Unfortunately I have not found anything like this inside the Solr
> > documentation.
> > Is it possible to achieve something like that or the only solution is
> > writing a custom Java class for each combination filter I need to use for
> > synonyms analysis?
> >
> > Thanks.
> >
> > Bye,
> > *Raffaella*
> >
> >
> > ----
> >> Newsletter and resources for Solr beginners and intermediates:
> >> http://www.solr-start.com/
> >>
> >>
> >> On 27 September 2016 at 21:10, Raf <r....@gmail.com> wrote:
> >> > Hi,
> >> > is it possible to configure a custom analysis for synonyms the same
> way
> >> we
> >> > do for index/query field analysis?
> >> >
> >> > Reading the *SynonymFilter* documentation[0], I have found I can
> specify
> >> a
> >> > custom analyzer by writing its class name.
> >> >
> >> > Example:
> >> > <fieldType name="myField_it" class="solr.TextField" >
> >> > <analyzer>
> >> > <tokenizer class="MyTokenizer" />
> >> > <filter class="solr.LowerCaseFilterFactory"/>
> >> > <filter class="MyFilter_1" />
> >> > <filter class="MyFilter_2" />
> >> > <filter class="solr.SynonymFilterFactory"
> >> synonyms="synonyms.txt"
> >> > ignoreCase="true" expand="true"
> >> > analyzer="org.apache.lucene.analysis.it.ItalianAnalyzer"/>
> >> > </analyzer>
> >> > </fieldType>
> >> >
> >> >
> >> > What I would like to achieve, instead, it is something like this:
> >> > <fieldType name="myField_it" class="solr.TextField">
> >> > <analyzer>
> >> > <tokenizer class="MyTokenizer" />
> >> > <filter class="solr.LowerCaseFilterFactory"/>
> >> > <filter class="MyFilter_1" />
> >> > <filter class="MyFilter_2" />
> >> > <filter class="solr.SynonymFilterFactory"
> >> synonyms="synonyms.txt"
> >> > ignoreCase="true" expand="true">
> >> > <analyzer>
> >> > <tokenizer class="MyTokenizer" />
> >> > <filter class="solr.LowerCaseFilterFactory"/>
> >> > <filter class="MyFilter_1" />
> >> > </analyzer>
> >> > </filter>
> >> > </analyzer>
> >> > </fieldType>
> >> >
> >> >
> >> > I have tried to configure it this way, but it does not work.
> >> > I do not get any configuration error, but the custom analyzer is not
> >> > applied to synonyms.
> >> >
> >> > Is it possible to achieve this result by configuration or am I forced
> to
> >> > write a custom Analyzer class?
> >> >
> >> > I am currently using Solr 5.2.1.
> >> > At the moment I cannot upgrade to a newer version.
> >> >
> >> >
> >> > Thank you very much for any help you can provide.
> >> >
> >> > Regards,
> >> > *Raf*
> >> >
> >> >
> >> > [0]
> >> > http://archive.apache.org/dist/lucene/solr/ref-guide/
> >> apache-solr-ref-guide-5.2.pdf
> >> > p. 132
> >>
>
Re: Configuring a custom Analyzer for the SynonymFilter
Posted by Alexandre Rafalovitch <ar...@gmail.com>.
Before you go down this rabbit hole, are you actually sure this does
what you think it does?
As far as I can tell, that parameter is for analyzing/parsing the
synonym entries in the synonym file. Not the incoming search queries
or text actually being indexed. Did you get it to work with the
simpler configuration?
Just double checking.
Regards,
Alex.
----
Newsletter and resources for Solr beginners and intermediates:
http://www.solr-start.com/
On 27 September 2016 at 22:45, Raf <r....@gmail.com> wrote:
> On Tue, Sep 27, 2016 at 4:22 PM, Alexandre Rafalovitch <ar...@gmail.com>
> wrote:
>
>> Looking at the code (on GitHub is easiest), it can take either
>> analyzer or tokenizer but definitely not any chain definitions. This
>> seems to be the same all the way to 6.2.1.
>>
>
> Thanks for your answer Alex.
>
> Does anyone know if it exists a viable alternative to make it configurable
> inside the schema.xml instead of defining a custom Java class?
>
> I was thinking about something like:
>
> * defining the *analyzer* outside of the *field* element, giving it a name:
> <analyzer name="myAnalyzer">
> <tokenizer class="MyTokenizer" />
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="MyFilter_1" />
> </analyzer>
>
> * referring to it inside the *SynonymFilter* definition by its name:
> <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
> ignoreCase="true" expand="true" analyzer="myAnalyzer"/>
>
> Unfortunately I have not found anything like this inside the Solr
> documentation.
> Is it possible to achieve something like that or the only solution is
> writing a custom Java class for each combination filter I need to use for
> synonyms analysis?
>
> Thanks.
>
> Bye,
> *Raffaella*
>
>
> ----
>> Newsletter and resources for Solr beginners and intermediates:
>> http://www.solr-start.com/
>>
>>
>> On 27 September 2016 at 21:10, Raf <r....@gmail.com> wrote:
>> > Hi,
>> > is it possible to configure a custom analysis for synonyms the same way
>> we
>> > do for index/query field analysis?
>> >
>> > Reading the *SynonymFilter* documentation[0], I have found I can specify
>> a
>> > custom analyzer by writing its class name.
>> >
>> > Example:
>> > <fieldType name="myField_it" class="solr.TextField" >
>> > <analyzer>
>> > <tokenizer class="MyTokenizer" />
>> > <filter class="solr.LowerCaseFilterFactory"/>
>> > <filter class="MyFilter_1" />
>> > <filter class="MyFilter_2" />
>> > <filter class="solr.SynonymFilterFactory"
>> synonyms="synonyms.txt"
>> > ignoreCase="true" expand="true"
>> > analyzer="org.apache.lucene.analysis.it.ItalianAnalyzer"/>
>> > </analyzer>
>> > </fieldType>
>> >
>> >
>> > What I would like to achieve, instead, it is something like this:
>> > <fieldType name="myField_it" class="solr.TextField">
>> > <analyzer>
>> > <tokenizer class="MyTokenizer" />
>> > <filter class="solr.LowerCaseFilterFactory"/>
>> > <filter class="MyFilter_1" />
>> > <filter class="MyFilter_2" />
>> > <filter class="solr.SynonymFilterFactory"
>> synonyms="synonyms.txt"
>> > ignoreCase="true" expand="true">
>> > <analyzer>
>> > <tokenizer class="MyTokenizer" />
>> > <filter class="solr.LowerCaseFilterFactory"/>
>> > <filter class="MyFilter_1" />
>> > </analyzer>
>> > </filter>
>> > </analyzer>
>> > </fieldType>
>> >
>> >
>> > I have tried to configure it this way, but it does not work.
>> > I do not get any configuration error, but the custom analyzer is not
>> > applied to synonyms.
>> >
>> > Is it possible to achieve this result by configuration or am I forced to
>> > write a custom Analyzer class?
>> >
>> > I am currently using Solr 5.2.1.
>> > At the moment I cannot upgrade to a newer version.
>> >
>> >
>> > Thank you very much for any help you can provide.
>> >
>> > Regards,
>> > *Raf*
>> >
>> >
>> > [0]
>> > http://archive.apache.org/dist/lucene/solr/ref-guide/
>> apache-solr-ref-guide-5.2.pdf
>> > p. 132
>>
Re: Configuring a custom Analyzer for the SynonymFilter
Posted by Raf <r....@gmail.com>.
On Tue, Sep 27, 2016 at 4:22 PM, Alexandre Rafalovitch <ar...@gmail.com>
wrote:
> Looking at the code (on GitHub is easiest), it can take either
> analyzer or tokenizer but definitely not any chain definitions. This
> seems to be the same all the way to 6.2.1.
>
Thanks for your answer Alex.
Does anyone know if it exists a viable alternative to make it configurable
inside the schema.xml instead of defining a custom Java class?
I was thinking about something like:
* defining the *analyzer* outside of the *field* element, giving it a name:
<analyzer name="myAnalyzer">
<tokenizer class="MyTokenizer" />
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="MyFilter_1" />
</analyzer>
* referring to it inside the *SynonymFilter* definition by its name:
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
ignoreCase="true" expand="true" analyzer="myAnalyzer"/>
Unfortunately I have not found anything like this inside the Solr
documentation.
Is it possible to achieve something like that or the only solution is
writing a custom Java class for each combination filter I need to use for
synonyms analysis?
Thanks.
Bye,
*Raffaella*
----
> Newsletter and resources for Solr beginners and intermediates:
> http://www.solr-start.com/
>
>
> On 27 September 2016 at 21:10, Raf <r....@gmail.com> wrote:
> > Hi,
> > is it possible to configure a custom analysis for synonyms the same way
> we
> > do for index/query field analysis?
> >
> > Reading the *SynonymFilter* documentation[0], I have found I can specify
> a
> > custom analyzer by writing its class name.
> >
> > Example:
> > <fieldType name="myField_it" class="solr.TextField" >
> > <analyzer>
> > <tokenizer class="MyTokenizer" />
> > <filter class="solr.LowerCaseFilterFactory"/>
> > <filter class="MyFilter_1" />
> > <filter class="MyFilter_2" />
> > <filter class="solr.SynonymFilterFactory"
> synonyms="synonyms.txt"
> > ignoreCase="true" expand="true"
> > analyzer="org.apache.lucene.analysis.it.ItalianAnalyzer"/>
> > </analyzer>
> > </fieldType>
> >
> >
> > What I would like to achieve, instead, it is something like this:
> > <fieldType name="myField_it" class="solr.TextField">
> > <analyzer>
> > <tokenizer class="MyTokenizer" />
> > <filter class="solr.LowerCaseFilterFactory"/>
> > <filter class="MyFilter_1" />
> > <filter class="MyFilter_2" />
> > <filter class="solr.SynonymFilterFactory"
> synonyms="synonyms.txt"
> > ignoreCase="true" expand="true">
> > <analyzer>
> > <tokenizer class="MyTokenizer" />
> > <filter class="solr.LowerCaseFilterFactory"/>
> > <filter class="MyFilter_1" />
> > </analyzer>
> > </filter>
> > </analyzer>
> > </fieldType>
> >
> >
> > I have tried to configure it this way, but it does not work.
> > I do not get any configuration error, but the custom analyzer is not
> > applied to synonyms.
> >
> > Is it possible to achieve this result by configuration or am I forced to
> > write a custom Analyzer class?
> >
> > I am currently using Solr 5.2.1.
> > At the moment I cannot upgrade to a newer version.
> >
> >
> > Thank you very much for any help you can provide.
> >
> > Regards,
> > *Raf*
> >
> >
> > [0]
> > http://archive.apache.org/dist/lucene/solr/ref-guide/
> apache-solr-ref-guide-5.2.pdf
> > p. 132
>
Re: Configuring a custom Analyzer for the SynonymFilter
Posted by Alexandre Rafalovitch <ar...@gmail.com>.
Looking at the code (on GitHub is easiest), it can take either
analyzer or tokenizer but definitely not any chain definitions. This
seems to be the same all the way to 6.2.1.
Regards,
Alex.
----
Newsletter and resources for Solr beginners and intermediates:
http://www.solr-start.com/
On 27 September 2016 at 21:10, Raf <r....@gmail.com> wrote:
> Hi,
> is it possible to configure a custom analysis for synonyms the same way we
> do for index/query field analysis?
>
> Reading the *SynonymFilter* documentation[0], I have found I can specify a
> custom analyzer by writing its class name.
>
> Example:
> <fieldType name="myField_it" class="solr.TextField" >
> <analyzer>
> <tokenizer class="MyTokenizer" />
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="MyFilter_1" />
> <filter class="MyFilter_2" />
> <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
> ignoreCase="true" expand="true"
> analyzer="org.apache.lucene.analysis.it.ItalianAnalyzer"/>
> </analyzer>
> </fieldType>
>
>
> What I would like to achieve, instead, it is something like this:
> <fieldType name="myField_it" class="solr.TextField">
> <analyzer>
> <tokenizer class="MyTokenizer" />
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="MyFilter_1" />
> <filter class="MyFilter_2" />
> <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
> ignoreCase="true" expand="true">
> <analyzer>
> <tokenizer class="MyTokenizer" />
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="MyFilter_1" />
> </analyzer>
> </filter>
> </analyzer>
> </fieldType>
>
>
> I have tried to configure it this way, but it does not work.
> I do not get any configuration error, but the custom analyzer is not
> applied to synonyms.
>
> Is it possible to achieve this result by configuration or am I forced to
> write a custom Analyzer class?
>
> I am currently using Solr 5.2.1.
> At the moment I cannot upgrade to a newer version.
>
>
> Thank you very much for any help you can provide.
>
> Regards,
> *Raf*
>
>
> [0]
> http://archive.apache.org/dist/lucene/solr/ref-guide/apache-solr-ref-guide-5.2.pdf
> p. 132