Ligatures in NeoOffice/OpenOffice

[Thomas Fischer]

Hello,

I came across a PDF file created using NeoOffice 3.0, which uses some special 
glyphs for ligatures.
Copying text or text extraction with PDFBox (1.6) yields results like
"…umstrien, was die Unsierheit…".
The additional glyphs can be mapped using the table

ft;E039
ch;E03B
tt;E03C
Qu;E048
Th;E049

I want to ask if anybody knows anything about ligatures in the OpenOffice 
family: e.g. is this a standard behaviour or will every new PDF file create new 
numbers for these glyphs (the codes are in the "Private Use" area), or wether 
there is a table somewhere for the glyphs used in OpenOffice.

Any help would be appreciated.


Best regards
Thomas Fischer