Based on David's input, I'm willing to add a TCF value to the list of time codes, but I'm reluctant at this point to remove the individual SMPTE values. I'm also concerned that a single value of "TCF" may be inadequate, and that AES31-3 may specify some variation in TCF (just as SMPTE has its variety of flavors), and so we may need more than one "TCF" value. But without a copy of the standard in front of me, that's hard to judge. I'll add a TCF value for the moment, leave in the SMPTE values, and I'll try to order up a copy of the AES standard to review to see if we should put additional, more extensive support for TCF time code values in. If David could supply some brief (sentence or two) descriptive language regarding TCF for me to include in the documentation section of the schema, I'd appreciate it. On another issue, I'm interested in hearing more from people on the processMD/sourceMD issue that Carl has raised. In MOA2, sourceMD was used for the metadata that Carl has suggested be included in a processMD section. I'm assuming that most of what LC has in mind for placing in the sourceMD section is descriptive metadata regarding the source document; in MOA2, we put this type of descriptive metadata in a descMD element up with all the other descriptive metadata sections. Would people prefer 1. adding a processMD section to record derivation/ migration information, and using the sourceMD element to record descriptive metadata regarding the source document, or 2. going with the MOA2 approach of having descriptive metadata regarding source put up in the first descriptive metadata section, with derivation/migration information recorded in sourceMD? Be aware that I will equate silence with indifference, and since Carl's pretty much the only one to voice a strong opinion so far, if no one else has a preference I will probably go ahead and add a processMD section. If you have an opinion one way or another, now would be the time to speak up. I would like to resolve this one final issue, and then put the finalized, revised schema up at LC's website. Thanks!