Getting a hold of headers in a pdf file exported from a libreoffice document

[Jyothish]

Hello, I have a pdf file that is created by exporting libreoffice typed documents. I would like to extract text in the file which has any of the following three characteristics :

1. A different font size from the standard for the document
2. The text is in bold.
3. The text is underlined.
   Can you explain how this can be achieved? I imported pdf files and looked at elements of the pages list, but I am not sure how to proceed.

w: www.tarams.com

   
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[Roberto Alsina]

rst2pdf is not the right tool for this job.

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[Jyothish]

Can it be done with pdfrw??