How does Zenscript work?

Some facts about zenscript (Print To E-Commerce): We start out with the same high-resolution PDF (Portable Document Format) file that a mail-order business would take to their printer. (For some catalogs we might have to have the catalog source in Quark, InDesign, PageMaker or whatever layout program is used). We use several UNIX utilities and custom PERL programs to create the PHP-produced HTML interface that you see in the zenscript version.

We've searched the internet for a similar service or process, and can't find any fast-loading e-commerce offering that approaches the legiblity, fidelity to the catalog browsing experience, supporting click-through ordering, combined with the database-enabled versatility of Zenscript.