PDFlib Text Extraction Toolkit (TET) Manual

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Unmapped glyphs (i.e. characters which are visible on the page, but cannot be extracted by TET) can be identified with the unknown member of the TET_char_info structure (see Table 10.15, page 179), or with the Glyph/@unknown attribute in TETML. 96 Chapter 7: Advanced Unicode Handling
7.3 Unicode Postprocessing TET offers various controls for fine-tuning the Unicode characters comprising the extracted text. The postprocessing steps discussed in this chapter are defined in the Unicode standard. They are available in TET and will be processed in the following order: > Foldings are controlled by the fold document option and preserve, remove, or replace certain characters. Examples: remove hyphens which are used to split words, remove Arabic Tatweel characters. > Decomposition is controlled by the decompose document option and replaces a character with one ore more equivalent characters. Examples: split ligatures, map fullwidth ASCII and symbol variants to the corresponding non-fullwidth characters. > Normalization is controlled by the normalize document option and converts the text to one of the normalized Unicode forms. Examples: combine base character and diacritical character to a common character; map Ohm sign to Greek Omega. 7.3.1 Unicode Folding Foldings process one or more Unicode characters and apply a certain action on each of the characters. The following actions are available: > preserve the character; > remove the character; > replace it with a another (fixed) character. Foldings are not chained: the output of a folding will not be processed again by the available foldings. Foldings affect only the Unicode text output, but not the set of glyphs reported in the TET_char_info structure or the elements in TETML. For example, if a folding removes certain Unicode characters, the corresponding glyphs which created the initial characters will still be reported. In order to improve readability the examples in the tables below list isolated suboptions of the fold option list. Keep in mind that these suboptions must be combined to a single large fold option list if you want to apply multiple foldings; do not supply the fold option more than once. For example, the following is wrong: fold={ {[:blank:] U+0020} } fold={ {_dehyphenation remove} } WRONG! The following option list shows the correct syntax for multiple foldings: fold={ {[:blank:] U+0020 } {_dehyphenation remove} } 7.3 Unicode Postprocessing 97
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ABC Text Extraction Toolkit (TET) V
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Contents 0 First Steps with TET 7 0
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8.6 Restrictions and Caveats 121 9
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0.2 Applying the TET License Key Us
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Setting the license key with a TET
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CJK support. TET includes full supp
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The TET Plugin is a free extension
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new connector for the TIKA toolkit
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Table 2.1 TET command-line options
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2.2 Constructing TET Command Lines
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Extract images from file.pdf in a r
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3.2 C Binding TET is written in C w
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3.3 C++ Binding Note For applicatio
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3.4 COM Binding Installing the TET
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The following method of the String
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3.7 Objective-C Binding Although th
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3.8 Perl Binding The TET wrapper fo
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} catch (TETException $e) { print "
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3.11 REALbasic Binding Installing t
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oot :to => "home#demo" > Edit app/c
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tion occurs, the job log shows the
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Acrobat provides only garbage when
Page 46 and 47: BUILD SUCCESSFUL Total time: 2 seco
Page 48 and 49: 4.3 TET Connector for the Solr Sear
Page 50 and 51: SQL> GRANT EXECUTE ON CTX_DOC TO HR
Page 52 and 53: 4.5 TET PDF IFilter for Microsoft P
Page 54 and 55: 4.6 TET Connector for the Apache TI
Page 56 and 57: 4.7 TET Connector for MediaWiki Med
Page 59 and 60: 5 Configuration 5.1 Extracting Cont
Page 61 and 62: 5.2 Resource Configuration and File
Page 63 and 64: product manually, make sure to use
Page 65 and 66: 5.3 Recommendations for common Scen
Page 67 and 68: Also to ensure text fidelity you ma
Page 69 and 70: 6 Text Extraction 6.1 PDF Document
Page 71 and 72: How to display with Acrobat X: Tool
Page 73 and 74: 6.2 Page and Text Geometry Default
Page 75 and 76: width (x, y) beta fontsize baseline
Page 77 and 78: * Query ascender and descender valu
Page 79 and 80: 6.3 Chinese, Japanese, and Korean T
Page 81 and 82: Table 6.1 CJK compatibility decompo
Page 83 and 84: Since the PDF document may map pres
Page 85 and 86: Separator characters are inserted b
Page 87 and 88: this situation and recombines both
Page 89 and 90: Table 6.4 Document styles docstyle=
Page 91 and 92: 7 Advanced Unicode Handling 7.1 Imp
Page 93 and 94: Composite characters and sequences.
Page 95: 7.2.2 Filters for Granularity Word
Page 99 and 100: Default foldings. Except for granul
Page 101 and 102: Compatibility decomposition. Charac
Page 103 and 104: In contrast, the following option l
Page 105 and 106: Table 7.7 Unicode normalization for
Page 107 and 108: 7.5 Unicode Mapping for Glyphs Whil
Page 109 and 110: Fig. 7.2 Sample font reports create
Page 111 and 112: glyphmapping {{fontname=Warnock* to
Page 113 and 114: 8 Image Extraction 8.1 Image Extrac
Page 115 and 116: 8.2 Image Merging and Filtering Ima
Page 117 and 118: 8.3 Placed Images and Image Resourc
Page 119 and 120: 8.5 Geometry of Placed Images Using
Page 121: 8.6 Restrictions and Caveats Image
Page 124 and 125: Various elements and attributes in
Page 126 and 127: c h e n 126 Chapter 9: TET Markup
Page 128 and 129: tet --tetml wordplus file.pdf With
Page 130 and 131: Object ’objects[49]/Subtype’ do
Page 132 and 133: Table 9.3 TETML elements and attrib
Page 134 and 135: 9.4 Transforming TETML with XSLT Ve
Page 136 and 137: document containing the xml process
Page 138 and 139: [TheSansBold-Plain/13.98] 1 [TheSan
Page 141 and 142: 10 TET Library API Reference 10.1 O
Page 143 and 144: List containing one option list wit
Page 145 and 146: Unicode sets. Unicode sets and can
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10.4 Geometric Types Rectangle. A r
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Table 10.2 Global options for TET_s
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10.6.2 Setup C TET *TET_new(void) C
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C++ int delete_pvf(wstring filename
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10.6.4 Unicode Conversion Function
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10.6.5 Exception Handling C++ wstri
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10.6.6 Logging The logging feature
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10.7 Document Functions C++ int ope
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Table 10.8 Document options for TET
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Table 10.8 Document options for TET
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Table 10.9 Suboptions for the glyph
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10.8 Page Functions C++ int open_pa
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Table 10.10 Page options for TET_op
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Table 10.11 Suboptions for the cont
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Table 10.12 Suboptions for the layo
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10.9 Text and Metrics Retrieval Fun
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Bindings C and C++ language binding
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10.10 Image Retrieval Functions C++
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C++ int write_image_file(int doc, i
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10.11 TET Markup Language (TETML) F
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Java and .NET language bindings: th
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estricted pCOS mode if nocopy=false
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10.12 pCOS Functions 191
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Image Retrieval Functions Function
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Index A annotations 71 API referenc
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TET command-line tool 17 TET connec
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