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[fitsbits] Dataset identifications.
There is an effort underway at several of the NASA archives
to provide a standard dataset identifier for data that can be retrieved from the archives. The initial motivation is that when authors publish a paper they will be able to specify the data that was used in analysis and systems like the ADS will be able to provide links to these data in a systematic way from the papers (and vice versa for the archives). Currently this is done for a few datasets but it's a very manual and labor intensive process. Although the initial impetus is coming from some of the NASA sites, we've been talking with the VO efforts and hope that the ID will be of general utility. I've no doubt that if ID's become established they will be used in many different ways. There are discussions still ongoing as to the exact format to be used. It is intended that the overall format will be compatible with the identification standards that are being discussed in the Virtual Observatory world. An example ID might be ADS/Sa.ROSAT#X/rh701576n00 where the ADS indicates the the ADS will provide the high level resolution service, the 'Sa.ROSAT' is an observatory identifier, and the element that follows the # is observatory specific, but should be familiar enough for those who have used ROSAT data. The question for this group is not so much a discussion of the format of the ID. Rather it was pointed out that if these IDs are successful it would be useful to be able to have a standard FITS keyword that would indicate the dataset id that the current file belongs to. The keyword 'DS_IDENT' has been suggested. Does anyone have objections to this or do they know of systems that already use this keyword? Googling DS_IDENT returns an album of Donna Summer's but no FITS references. Also, are there any issues the we need to resolve regarding the usage of the keyword? One that comes to mind is whether use of this keyword should be recommended only for the primary header of a FITS file. If not then a file may not be associated with a unique dataset id. I'd appreciate any comments, questions or thoughts on the subject. Thanks, Tom McGlynn HEASARC |
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