Hi All I have a problem that when i Query Solr it matches results, but when i enable highlighting on the results of this query the highlighting does not work..
My Query is
+Contents:"item 503"
Contents is of type text and one important thing in text item 503 appear as "item 503(c)", can open parenthesis at the end create problem?? please help
here is highlighting section in SolrSonfig.xml
<highlighting>
<!-- Configure the standard fragmenter -->
<!-- This could most likely be commented out in the "default" case -->
<fragmenter name="gap" class="org.apache.solr.highlight.GapFragmenter" default="true">
<lst name="defaults">
<int name="hl.fragsize">100</int>
</lst>
</fragmenter>
<!-- A regular-expression-based fragmenter (f.i., for sentence extraction) -->
<fragmenter name="regex" class="org.apache.solr.highlight.RegexFragmenter">
<lst name="defaults">
<!-- slightly smaller fragsizes work better because of slop -->
<int name="hl.fragsize">70</int>
<!-- allow 50% slop on fragment sizes -->
<float name="hl.regex.slop">0.5</float>
<!-- a basic sentence pattern -->
<str name="hl.regex.pattern">[-\w ,/\n\"']{20,200}</str>
</lst>
</fragmenter>
<!-- Configure the standard formatter -->
<formatter name="html" class="org.apache.solr.highlight.HtmlFormatter" default="true">
<lst name="defaults">
<str name="hl.simple.pre"><![CDATA[<em>]]></str>
<str name="hl.simple.post"><![CDATA[</em>]]></str>
</lst>
</formatter>
</highlighting>
and here is fieldtype definition in schema.xml
<fieldtype name="text" class="solr.TextField">
<analyzer>
<tokenizer class="solr.StandardTokenizerFactory" luceneMatchVersion="LUCENE_29"/>
<filter class="solr.StandardFilterFactory"/>
<!-- <filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.StopFilterFactory" luceneMatchVersion="LUCENE_29"/>
<filter class="solr.EnglishPorterFilterFactory"/>-->
</analyzer>
</fieldtype>
and here is field definition
<field name="Contents" type="text" indexed="true" stored="true" />
Regards
Ahsan.
Have you tried storing the term vectors too? If you're using the fast vector highlighter (which I think Solr might by default) you'll need those.
Related
I'm using Solr 6.2.1 and ExtractingRequestHandler (already included in Solr 6.2.1) to index pdf and word documents. All documents (pdf and word) are indexed with metadata (title, date, cp_revision, compagny, ...) but the content field is always empty.
According to the documentation I should have a non-empty content field : "Tika adds all the extracted text to the content field."
Has anybody know why the content field is empty ? According to this post answer it's maybe because I open my file in a non-binary mode but how to do it in binary mode ?
This is my solrconfig.xml file :
<lib dir="${solr.install.dir:../../../..}/contrib/extraction/lib" regex=".*\.jar" />
<lib dir="${solr.install.dir:../../../..}/dist/" regex="solr-cell-\d.*\.jar" />
...
<requestHandler name="/update/extract"
startup="lazy"
class="solr.extraction.ExtractingRequestHandler" >
<lst name="defaults">
<str name="xpath">/xhtml:html/xhtml:body/descendant:node()</str>
<str name="capture">content</str>
<str name="fmap.meta">attr_meta_</str>
<str name="uprefix">attr_</str>
<str name="lowernames">true</str>
</lst>
</requestHandler>
Try indexing with the files example in the examples/files, it is designed to parse rich-text format. If that works, you can figure out what goes wrong in your definition. I suspect the xpath parameter may be wrong and returning just empty content.
I was using the solr:alpine Docker image and had the same problem. Turns out the "content" field was getting mapped to Solr's "text" field which is indexed but not stored by default. See if "fmap.content=doc_content" in Curl does the trick.
I was having a similar problem and I fixed by setting the /update/extracthandler request handler to this:
<requestHandler name="/update/extract"
startup="lazy"
class="solr.extraction.ExtractingRequestHandler" >
<lst name="defaults">
<str name="lowernames">true</str>
<str name="fmap.meta">ignored_</str>
<str name="fmap.content">content</str>
<str name="update.chain">uuid</str>
</lst>
The key part being the content where it maps the Tika obtained contents to your "content" field, which must be defined in your schema, probably as stored=true
I am having problem with solr wildcard search and stopwords. I have added few stopwords "to", "for" ,"is" in stopwords.txt . When i am not doing a wildcard search , its working perfectly.
Query --> q=learningObjectTopic:to&rows=1
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">3</int>
<lst name="params">
<str name="q">learningObjectTopic:to</str>
<str name="rows">1</str>
</lst>
</lst>
<result name="response" numFound="0" start="0"/>
</response>
When i do a wildcard search its returning data .
Query --> q=learningObjectTopic:*to*&rows=1
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">5</int>
<lst name="params">
<str name="q">learningObjectTopic:*to*</str>
<str name="rows">1</str>
</lst>
</lst>
<result name="response" numFound="75" start="0">
<doc>
<str name="id">56f4bc54b2de79277297dcab</str>
<str name="learningObjectId">LO1_SK1_18</str>
<str name="learningObjectTopic">Introduction to Web Development</str>
<str name="category">learningObject</str>
<long name="_version_">1537824533459763200</long>
</doc>
</result>
</response>
This is my analyzer
<fieldType name="text_general" class="solr.TextField" multiValued="false" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
What i require is , "to" should not match in the wildcard query too. What am i missing here ?
Note : learningObjectTopic:to search skipped "to" words in results when i added "to" in stopwords , so stopword indexing is working .
Solr StopFilterFactory is not a multi term aware component and hence stopFilterFactory will not work on for wildcard queries.Reference link.
And also, the scenario may not be a valid one. since, if there is a keyword "Tokyo" in index, then the search keyword "to*" should return this result instead of showing "0" result which is not correct.
I modified the techproducts example to learn more about synonyms. The added field has the type text2_de
<fieldType name="text2_de" class="solr.TextField" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.ClassicTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.StopFilterFactory" format="snowball" words="lang/stopwords_de.txt" ignoreCase="true"/>
<filter class="solr.SynonymFilterFactory" expand="true" ignoreCase="true" synonyms="index_synonyms.txt"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.ClassicTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
The index_synonyms.txt was expanded by hierarchical synonyms starting with a level for faceting according https://wiki.apache.org/solr/HierarchicalFaceting
aaafoo => aaabar
bbbfoo => bbbfoo bbbbar
cccfoo => cccbar cccbaz
fooaaa,baraaa,bazaaa
Umwelt => 1/HS , 2/HS/Bereich , 3/HS/Bereich/Umwelt
Mensch => 1/HS , 2/HS/Bereich , 3/HS/Bereich/Mensch
...
The loaded term info shows, that the analyzer works very well and found 60x "2/hs/bereich" in a document set.
loaded term info for the testfield
I'm not able to make a solr-query to find these 60 documents. The auto generated hyperlink of the loaded term info
http://localhost:8983/solr/#/test/query?q=testfield:2%2Fhs%2Fbereich
found no matches (numFound="0"):
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">0</int>
<lst name="params">
<str name="q">testfield:2/hs/bereich</str>
<str name="indent">on</str>
<str name="wt">xml</str>
<str name="_">1463321610566</str>
</lst>
</lst>
<result name="response" numFound="0" start="0">
</result>
</response>
Please give me a tip to make an exact solr query syntax for synonyms to find these 60 documents!
Solution found: Please add wildcards in the auto generated query of the loaded term info in this example: testfield:2/hs/strahlung
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">24</int>
<lst name="params">
<str name="q">*:*</str>
<str name="facet.field">testfield</str>
<str name="indent">on</str>
<str name="facet.prefix">3/hs/strahlung</str>
<str name="fq">testfield:*2/hs/strahlung*</str>
<str name="rows">0</str>
<str name="facet">on</str>
<str name="wt">xml</str>
<str name="_">1463590654764</str>
</lst>
</lst>
<result name="response" numFound="68" start="0">
</result>
<lst name="facet_counts">
<lst name="facet_queries"/>
<lst name="facet_fields">
<lst name="testfield">
<int name="3/hs/strahlung/neutronen">44</int>
<int name="3/hs/strahlung/wirkung">37</int>
<int name="3/hs/strahlung/strahlensschutz">34</int>
<int name="3/hs/strahlung/exposition">22</int>
<int name="3/hs/strahlung/radioaktivitaet">22</int>
<int name="3/hs/strahlung/radiologisch">12</int>
<int name="3/hs/strahlung/strahlenart">7</int>
</lst>
</lst>
<lst name="facet_ranges"/>
<lst name="facet_intervals"/>
<lst name="facet_heatmaps"/>
</lst>
</response>
In combination with the facet.prefix 3/hs/strahlung it was possible to drill down the question for the hierarchical synonyms.
Using this command
curl '://localhost:8983/solr/update/extract?literal.id=doc1&commit=true' -F "myfile=#maven_tutorial.pdf"
we can index single pdf files,by specifying our own id(DOC1), in solr. But I want to index many pdf files to solr all at once. let solr keep track of id automatically.
Please help me.
You can use UUID type field as unique key.
First define the UUID field type
<fieldType name="uuid" class="solr.UUIDField" indexed="true" />
Add your id field in the schema.xml
<field name="id" type="uuid" indexed="true" stored="true" multiValued="false"/>
Make this field as the unique key
<uniqueKey>id</uniqueKey>
In solrconfig.xml update the chain for autogenerating the id
<updateRequestProcessorChain name="uuid">
<updateRequestProcessorChain name="uuid">
<processor class="solr.UUIDUpdateProcessorFactory">
<str name="fieldName">id</str>
</processor>
<processor class="solr.RunUpdateProcessorFactory" />
</updateRequestProcessorChain>
Now attach this update chain to the request handler which is extracting the content from the pdf files that you are submitting to solr.
<requestHandler name="/update/extract"
startup="lazy"
class="solr.extraction.ExtractingRequestHandler" >
<lst name="defaults">
<str name="lowernames">true</str>
<str name="uprefix">ignored_</str>
<str name="captureAttr">true</str>
<str name="fmap.a">links</str>
<str name="fmap.div">ignored_</str>
<str name="update.chain">uuid</str>
</lst>
I have some numerical data that must be searchable from a web front-end with the following format:
Toy type: Dog
Toy subtype: Spotted
Toy maker: John
Color: White
Estimated spots: 10
Actual spots: 11
Toy type: Cat
Toy subtype: Striped
Toy maker: Jane
Color: White
Estimated stripes: 5
Actual stripes: [Not yet counted]
A search query might be something like "Type:Cat, Stripes:4-6", or "Type:Dog, Subtype:Spotted", or "Color:White", or "Color:White, Maker:John".
I'm not sure if the data is best suited for a relational database because there are several types and subtypes, each with their own properties. On top of that, there are estimated and actual values for each property.
I'd like some recommendations for how to store and search this data. Please help!
EDIT: I changed the search queries so they are no longer free-form.
I recommend using Apache Solr to index and search your data.
How you use Solr depends on your requirements. I use it as a searchable cache of my data. Extremely useful when the raw master data must be keep as files. Lots of frameworks integrate Solr as their search backend.
For building front-ends to a Solr index, checkout solr-ajax.
Example
Install Solr
Download Solr distribution:
wget http://www.apache.org/dist/lucene/solr/4.7.0/solr-4.7.0.tgz
tar zxvf solr-4.7.0.tgz
Start Solr using embedded Jetty container:
cd solr-4.7.0/example
java -jar start.jar
Solr should now be running locally
http://localhost:8983/solr
data.xml
You did not specify a data format so I used the native XML supported by Solr:
<add>
<doc>
<field name="id">1</field>
<field name="toy_type_s">Dog</field>
<field name="toy_subtype_s">Spotted</field>
<field name="toy_maker_s">John</field>
<field name="color_s">White</field>
<field name="estimated_spots_i">10</field>
<field name="actual_spots_i">11</field>
</doc>
<doc>
<field name="id">2</field>
<field name="toy_type_s">Cat</field>
<field name="toy_subtype_s">Striped</field>
<field name="toy_maker_s">Jane</field>
<field name="color_s">White</field>
<field name="estimated_spots_i">5</field>
</doc>
</add>
Notes:
Every document in Solr must have a unique id
The field names have a trailing "_s" and "_i" in their names to indicate field types. This is a cheat to take advantage of Solr's dynamic field feature.
Index XML file
Lots of ways to get data into Solr. The simplest way is the curl command:
curl http://localhost:8983/solr/update?commit=true -H "Content-Type: text/xml" --data-binary #data.xml
It's worth noting that Solr supports other data formats, such as JSON and CSV.
Search indexed file
Again there are language libraries to support Solr searches, the following examples use curl. The Solr search syntax is along the lines you've required.
Here's a simple example:
$ curl http://localhost:8983/solr/select/?q=toy_type_s:Cat
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">1</int>
<lst name="params">
<str name="q">toy_type_s:Cat</str>
</lst>
</lst>
<result name="response" numFound="1" start="0">
<doc>
<str name="id">2</str>
<str name="toy_type_s">Cat</str>
<str name="toy_subtype_s">Striped</str>
<str name="toy_maker_s">Jane</str>
<str name="color_s">White</str>
<int name="estimated_spots_i">5</int>
<long name="_version_">1463999035283079168</long>
</doc>
</result>
</response>
A more complex search example:
$ curl "http://localhost:8983/solr/select/?q=toy_type_s:Cat%20AND%20estimated_spots_i:\[2%20TO%206\]"
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">2</int>
<lst name="params">
<str name="q">toy_type_s:Cat AND estimated_spots_i:[2 TO 6]</str>
</lst>
</lst>
<result name="response" numFound="1" start="0">
<doc>
<str name="id">2</str>
<str name="toy_type_s">Cat</str>
<str name="toy_subtype_s">Striped</str>
<str name="toy_maker_s">Jane</str>
<str name="color_s">White</str>
<int name="estimated_spots_i">5</int>
<long name="_version_">1463999035283079168</long>
</doc>
</result>
</response>
You have structured the problem in such a way as to make this very difficult to solve. Your data is structured data, with specific columns. Yet, you are trying to use free-form queries to search through it.
So, the normal way to do this is to allow search terms for each of the fields.
The next way to approach this is as a full-text problem. This definitely has its issues. For instance, numbers are typically stop words. And values in different fields would get confused with each other.
Of course, you can try to do free form search on structured data. This is, after all, something that Google and Microsoft are doing. If you search "airfare from New York to London" on Google, you will get lists of flights. But this is a hard problem to approach through understanding the query.