1> Yes, you can use your single definition. The author identifies the "text" field as a catch-all. Somewhere in the schema there'll be a copyField directive copying (perhaps) many different fields to the "text" field. That permits simple searches against a single field rather than, say, using edismax to search across multiple separate fields.
2> The link you referenced is for Data Import Handler, which is much different than just posting files to Solr. See ExtractingRequestHandler: https://cwiki.apache.org/confluence/display/solr/Uploading+Data+with+Solr+Cell+using+Apache+Tika. There are ways to map meta-data fields from the doc into specific fields matching your schema. Be a little careful here. There is no standard across different types of docs as to what meta-data field is included. PDF might have a "last_edited" field. Word might have a "last_modified" field where the two mean the same thing. Here's a link to a SolrJ program that'll dump all the fields: https://lucidworks.com/2012/02/14/indexing-with-solrj/. You can easily hack out the DB bits. BTW, once you get more familiar with processing, I strongly recommend you do the document processing on the client, the reasons are outlined in that article. bq: even I define the fields as he said I cannot see them in the search results as keys in JSON are the fields set as stored="true"? They must be to be returned in requests (skipping the docValues discussion here). 3> Yes, the text field is a concatenation of all the other ones. Because it has stored=false, you can only search it, you cannot highlight or view. Fields you highlight must have stored=true BTW. Whether or not you can highlight "Trevor Hastie" depends an a lot of things, most particularly whether that text is ever actually in a field in your index. Just because there's no guarantee that the name of the file is indexed in a searchable/highlightable way. And the query q=id:Trevor Hastie won't do what you think. It'll be parsed as id:Trevor _text_:Hastie _text_ is the default field, look for a "df" parameter in your request handler in solrconfig.xml (usually "/select" or "/query"). On Sat, Jun 17, 2017 at 3:04 PM, ZiYuan <ziyu...@gmail.com> wrote: > Hi, > > I am new to Solr and I need to implement a full-text search of some PDF > files. The indexing part works out of the box by using bin/post. I can see > search results in the admin UI given some queries, though without the > matched texts and the context. > > Now I am reading this post > <http://www.codewrecks.com/blog/index.php/2013/05/27/hilight-matched-text-inside-documents-indexed-with-solr-plus-tika/> > for the highlighting part. It is for an older version of Solr when managed > schema was not available. Before fully understand what it is doing I have > some questions: > > 1. He defined two fields: > > <field name="content" type="text_general" indexed="false" stored="true" > multiValued="false"/> > <field name="text" type="text_general" indexed="true" stored="false" > multiValued="true"/> > > But why are there two fields needed? Can I define a field > > <field name="content" type="text_general" indexed="true" stored="true" > multiValued="true"/> > > to capture the full text? > > 2. How are the fields filled? I don't see relevant information in > TikaEntityProcessor's documentation > <https://lucene.apache.org/solr/6_6_0/solr-dataimporthandler-extras/org/apache/solr/handler/dataimport/TikaEntityProcessor.html#fields.inherited.from.class.org.apache.solr.handler.dataimport.EntityProcessorBase>. > The current text extractor should already be Tika (I can see > > "x_parsed_by": > ["org.apache.tika.parser.DefaultParser","org.apache.tika.parser.pdf.PDFParser"] > > in the returned JSON of some query). But even I define the fields as he > said I cannot see them in the search results as keys in JSON. > > 3. The _text_ field seems a concatenation of other fields, does it contain > the full text? Though it does not seem to be accessible by default. > > To be brief, using The Elements of Statistical Learning > <http://statweb.stanford.edu/~tibs/ElemStatLearn/printings/ESLII_print10.pdf> > as an example, how to highlight the relevant texts for the query "SVM"? And > if changing the file name into "The Elements of Statistical Learning - > Trevor Hastie.pdf" and post it, how to highlight "Trevor Hastie" for the > query "id:Trevor Hastie"? > > Thank you. > > Best regards, > Ziyuan
