Cannot filter tokens (sentences) by content using regular expressions

KateSh

Hello everyone!
I'm new to text mining. A very simple task turned out to be an unsolvable one for me 

I have 50 pdf documents in English. From there I need to extract the sentences which contain at least one modal verb (for further analysis).
Inside the "process documents from files" operator I created "tokenize" (linguistic sentences) and "filter tokens by content" operators. In "filter tokens by content" I wrote the verbs divided by a vertical line with no spaces, but it doesn't work, the results are empty. It works fine if I write only one verb, but if I write many verbs with a vertical line, it doesn't. I tried all the conditions of the operator, none of them make it work.
I will be very grateful for help!
Here is my process:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<process version="5.3.015">

  <context>

    <input/>

    <output/>

    <macros/>

  </context>

  <operator activated="true" class="process" compatibility="5.3.015" expanded="true" name="Process">

    <process expanded="true">

      <operator activated="true" class="text:process_document_from_file" compatibility="5.3.002" expanded="true" height="76" name="Process Documents from Files" width="90" x="313" y="120">

        <list key="text_directories">

          <parameter key="pdf" value="D:\Все\УЧЁБА\ВКР\Материал\Оригинальные"/>

        </list>

        <parameter key="file_pattern" value="*pdf"/>

        <process expanded="true">

          <operator activated="true" class="text:tokenize" compatibility="5.3.002" expanded="true" height="60" name="Tokenize" width="90" x="179" y="120">

            <parameter key="mode" value="linguistic sentences"/>

          </operator>

          <operator activated="true" class="text:filter_tokens_by_content" compatibility="5.3.002" expanded="true" height="60" name="Filter Tokens (by Content)" width="90" x="380" y="120">

            <parameter key="condition" value="matches"/>

            <parameter key="string" value="can|could|may|might"/>

            <parameter key="regular_expression" value="can|could|may|might"/>

          </operator>

          <connect from_port="document" to_op="Tokenize" to_port="document"/>

          <connect from_op="Tokenize" from_port="document" to_op="Filter Tokens (by Content)" to_port="document"/>

          <connect from_op="Filter Tokens (by Content)" from_port="document" to_port="document 1"/>

          <portSpacing port="source_document" spacing="0"/>

          <portSpacing port="sink_document 1" spacing="0"/>

          <portSpacing port="sink_document 2" spacing="0"/>

        </process>

      </operator>

      <connect from_op="Process Documents from Files" from_port="example set" to_port="result 1"/>

      <connect from_op="Process Documents from Files" from_port="word list" to_port="result 2"/>

      <portSpacing port="source_input 1" spacing="0"/>

      <portSpacing port="sink_result 1" spacing="0"/>

      <portSpacing port="sink_result 2" spacing="0"/>

      <portSpacing port="sink_result 3" spacing="0"/>

    </process>

  </operator>

</process>

lionelderkrikor

Hi @KateSh,

Did you try the parameter "contains" instead of "matches" ?

Regards,

Lionel

lionelderkrikor

Hi again @KateSh,

Otherwise, did you try the Filter Tokens Using Example Set operator : Check the tutorial of this process

Regards,

Lionel

KateSh

Thank you so mush, it helped!
(Sorry I didn't answer earlier, I was very busy yesterday)