CDX on the System ClipboardĬhemDraw and workalike products allow users to transfer drawings to other applications through the system clipboard. The binary CDX format uses byte tokens to represent objects and their attributes, and to define nesting relationships. Interconversion between the two formats is lossless everything that can be represented as a binary CDX file can also be represented as an XML CDX file. Both formats use the same concepts and define the same relationships. Two Flavors of CDX: Binary and XMLĬDX files come in two varieties: XML and binary. Each of these object can contain other objects, and so on. CambridgeSoft currently documents 38 object types, including: Document Node Bond and Curve. An Object FormatĬDX files store nested object representations, not unlike XML or JSON. The bottom line: chemical structures are but one player in CDX files. Other representation techniques are in common use - a topic that could be a discussion unto itself. I've seen many chemists create complex structure-activity and methodology tables, completely in ChemDraw. Another technique is to use a shaded circle attached to a chemical structure to represent a solid support. For example, it is not uncommon for a chemist to indicate unknown (or variable) placement of a ring substituent by drawing a bond bisecting the ring bond and perpendicular to it. Understanding CDX's wide scope is important because many chemists use free-form drawing techniques to make up for the lack of structured representation in their drawing packages. This stands in contrast to formats such as molfile, which only represent chemical structures. It's is capable of faithfully capturing everything that can drawn in ChemDraw, from abstract geometric shapes to free-form text to lines and curves to chemical structures.
A Drawing FormatĬDX is far more than a chemical structure representation format.
This article will give a short introduction to the ChemDraw CDX file format, and serve as a jumping off point for what will (hopefully) become a wider series on this topic. The ChemDraw CDX format is so important that it's one of two file formats accepted and used by the United States Patent and Trademark Office for chemical structure representation. It uses a native file format called "CDX", making CDX files a high-profile player in the world of cheminformatics. The answer is very likely to be ChemDraw.ĬhemDraw is the industry standard tool for generating publication-quality chemical structure graphics. A Brief Introduction to the ChemDraw CDX File Format T00:00:00.000ZĪsk just about any chemist which tool they use to create structure drawings that appear in their reports, manuscripts, and patents.
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