2D barcodes in postscript

I use the wonderful open source barcode creating postscript resource of Terry Burton:

http://code.google.com/p/postscriptbarcode/

Only thing you need to do in Postscript is (example is for a ISBN code 978-1-86074-271 with describing Text includetext):

0 0 moveto (978-1-86074-271) (includetext) /isbn /uk.co.terryburton.bwipp findresource exec

The project supports all major barcode symbologies.

Carsten

To expand on Mr. Horton's response, there are a number of possibilities here.

Barcodes may be implemented by use of special barcode fonts (preferred), application generation of vector artwork in PostScript representing the codes, PostScript procedures that generate vector artwork representing the codes presented as a procedure call, or even application generation of raster images representing the codes (least preferred).

Generally speaking, use of special barcode fonts is preferred for reasons of ease-of-use (i.e., what PostScript is necessary to implement this solution) and especially performance since font glyphs are cached in virtually all PostScript implementations.

            - Dov

Yes, it certainly is.

Start by finding and acquiring the specifications for the particular barcode symbology you need from the vendor or standards group that maintains it.

They probably won't have PostScript procedures already written for you, but you can write your own that meet the specifications, once you know what they are.