PDFlib TET PDF IFilter 4.0 Manual

2.5 Custom Glyph Mapping Tables
Although many workarounds are implemented in TET PDF IFilter, in certain rare cases it
may be unable to correctly extract text from PDF documents if crucial information for
Unicode mapping is missing from the document. If you have many documents with
similar properties (e.g. created with the same software and set of fonts) you can provide
auxiliary Unicode mapping tables which can be used to extract text from PDF documents
which otherwise could not be indexed.
TET PDF IFilter supports various table formats which are detailed in the documentation
of the PDFlib TET product. You can also use the free PDFlib FontReporter and
PDFlib TET Plugins for Adobe Acrobat to try such mapping tables. Unicode mapping tables
must be configured with appropriate document options in the configuration file,
and can be placed in the resource directory of the TET PDF IFilter installation directory.
XML configuration for TET options. Option lists for controlling operation of the TET
core (e.g. for using custom glyph mapping tables) must be constructed according to the
option list syntax described in the TET product documentation, and can be supplied to
TET PDF IFilter in the DocOptions, PageOptions, and TetOptions elements of the XML configuration
file, which are all children of the Tet element:
glyphmapping {{fontname=T* glyphlist={tex}}}
searchpath={C:/glyphlists}
2.5 Custom Glyph Mapping Tables 35