CDokumentitaihedocx

CDokumentitaihedocx is a proprietary document format developed by the company C-Dokumenti in 2015. It combines a binary container structure with a subset of the Open Packaging Conventions used in Microsoft Office 2007‑2013. The format encodes a main XML document that holds text, tables, and embedded media, and supplies a manifest file that lists all embedded objects. The file extension .docx is shared with the Office Open XML format, but the internal XML schema is unique to C-Dokumenti and is not fully compatible with the standard.

The format was marketed as a lightweight alternative to full Office documents for use in internal corporate portals. It provides read and write APIs in several programming languages. While Windows and Linux client applications can open and edit .docx files produced by the C-Dokumenti editor, many mainstream office suites treat them as unrecognized or warn users that the document may not be compatible. The document format is no longer actively maintained; the last release was version 3.1 in 2019. Experts recommend using standard Office Open XML or PDF for cross‑platform document sharing.