This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. The copyright holder grants you permission to redistribute this document freely as a verbatim copy. Furthermore, the copyright holder permits you to develop any derived work from this document provided that the following conditions are met. a) The derived work acknowledges the fact that it is derived from this document, and maintains a prominent reference in the work to the original source. b) The fact that the derived work is not the original OpenMath document is stated prominently in the derived work. Moreover if both this document and the derived work are Content Dictionaries then the derived work must include a different CDName element, chosen so that it cannot be confused with any works adopted by the OpenMath Society. In particular, if there is a Content Dictionary Group whose name is, for example, `math' containing Content Dictionaries named `math1', `math2' etc., then you should not name a derived Content Dictionary `mathN' where N is an integer. However you are free to name it `private_mathN' or some such. This is because the names `mathN' may be used by the OpenMath Society for future extensions. c) The derived work is distributed under terms that allow the compilation of derived works, but keep paragraphs a) and b) intact. The simplest way to do this is to distribute the derived work under the OpenMath license, but this is not a requirement. If you have questions about this license please contact the OpenMath society at http://www.openmath.org. altenc http://www.openmath.org/cd http://www.openmath.org/cd/altenc.ocd 2006-03-30 official 2004-05-23 3 1 A CD of alternative encoding symbols This CD is motivated in part by a desire to maintain compatibility with the MathML semantics element, In order for it to be possible for OpenMath to express symbols in an alternative encoding (this facilitates the exact translation and representation of objects) we use the OpenMath attribution nodes (which performs a similar role to the MathML semantics nodes). The formats and descriptions of common syntaxes are held in this CD; at present this only includes LaTeX and MathML. Alternative encodings in OpenMath are dealt with by using OMATTR symbols together with the alternative encoding placed in a string. The string encoding must be valid XML, and so non-XML valid characters must themselves be encoded as suggested in "Draft of the OpenMath Standard". For alternative encodings to be represented in OpenMath, one must define a symbol to describe the encoding. MathML_encoding attribution A symbol which heads a piece of MathML encoding in an attribution. The MathML encoding is an XML encoding, and the details may be found at: http://www.w3.org/Math/Overview.html $\sin \left(1.5\right)$ \sin(1.5) 3 1 2 LaTeX_encoding attribution A symbol which heads a piece of LaTeX encoding in an attribution. \sin(1.5)