We hardly need tell this list what HTML is, but perhaps people are rather less familiar with XML, what it is, how it can be used, and working examples of its application. CML (Chemical Markup language) is the most mature and best developed and documented Chemical application of XML, and we have now made available an extensive range of resources and software tools to illustrate its form and its application, together with a list of some "frequently asked questions" about CML and XML The materials include 1. A (2 Mbyte) download for the JUMBO3-J browser written by Peter Murray-Rust, which is a standalone molecular browser written in Java and capable of reading not only CML files, but a wide range of legacy molecular formats. This browser includes the excellent JMVS 3D viewer written by Allistair Crossley and incorporated into JUMBO3 as an example of how such software can be easily extended via collaboration. The download includes source code for the core components of CML for the developers amongst you 2. An on-line demo and (400K) download for a lightweight version of JUMBO3 written in JavaScript by Peter and Michael Wright, and capable of viewing XML-CML files by converting them on the fly to SVG, which is then displayed using Adobe's SVG viewer. This is an excellent illustration of how XML data can be transformed into other XML forms (SVG is also XML), in this case for display purposes 3. An on-line demo and download for a CML aware version of the Peter Ertl's Java Molecular Editor (JME).. The base JME editor is extended using an interface (JMECML) to input and output CML as well as the usual JME supported formats. It comes as an application (which allows CML files to be read and written to local hard disk) and an applet (which allows CML files to be copied to the clipboard for pasting into other applications). You will need Java 1.2 to run this on your system. 4. We have compiled an FAQ which attempts to address many of the questions and issues often raised in connection with XML and CML. This is an on going project, and we expect will be extensively added to over the coming months, we hope via the questions and FAQs that you send us! If anyone has other examples of the use of CML and chemical applications of XML in general please let us know and we can include them on our pages (there are several excellent examples already out there, including the SelfML browser for physico chemical data written by Peter Murray-Rust and also available on-line for demonstrations at the site). There is much other new and updated information on the CML site, and to acquire the above and everything else, please go to http://www.xml-cml.org/ Peter Murray-Rust and Henry Rzepa. chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)