The PDF Core Library exports a complete set of APIs for creating PDF capable applications. There are low level functions for direct control of PDF data stream, and powerful APIs for parsing, viewing, printing, and editing PDF files. It is also the fundamental building block of all Zeon DocuCom products.

Since 1995, Field-Proven DocuCom PDF technology has completed font handling capabilities, including Type1, Type3, CFF, TrueType, CID and Multiple Master font substitution (2 MM fonts are included in the standard package). Zeon is the very first manufacture in the world to make PDF products compatible with DBCS Asian languages. Reduces developer's learning period of understanding another different APIs that deliver the same functionality of PDF document processing. Developers could produce PDF enabled applications without any technical limitation.