Re: [Devel] Re: strange cmap syntax

[Ken Lunde]

Hidetoshi,

You wrote:

> Is it the ToUnicode mapping(#5411) file?

No. A "ToUnicode" mapping file maps CIDs to Unicode code points. (BTW, I 
authored that Adobe Tech Note.)

The "ToUnicode" mapping files that are bundled with Acrobat use a special 
naming convention not shown in the Tech Note:

  /Registry + "-" + /Ordering + "-" + "UCS2"

For example:

  Adobe-GB1-UCS2
  Adobe-CNS1-UCS2
  Adobe-Japan1-UCS2
  Adobe-Korea1-UCS2

The other CMap-like files map non-Unicode to Unicode or Unicode to 
non-Unicode. Basically, it was what Acrobat engineers came up with as a 
way to perform code conversion between Unicode and non-Unicode encodings. 
While it's too late to implement a better system for Version 6.0, I shall 
propose that they implement an XML scheme for this purpose, which would 
then eliminate most, if not all, of the CMap-like files. They may need to 
keep the "ToUnicode" mapping files, though, as Distiller uses them.

Regards...

-- Ken