This paper presents an approach for text processing of PDF documents with well-defined layout structure. The scope of the approach is to explore the font's structure of PDF documents, using perceptual grouping. It consists on the extraction of text objects from the content stream of the documents and its grouping according to a set criterion, making also use of geometric-based regions in order to achieve the correct reading order. The developed approach processes the PDF documents using logical and structural rules to extract the entities present in them, and returns an optimized XML representation of the PDF document, useful for re-use, for example in text categorization. The system was trained and tested with Portuguese Legislation PDF documents extracted from the electronic Republic's Diary. Evaluation results show that our approach presents good results.
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