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[fitsbits] The CONTINUE and HIERARCH Conventions Public CommentPeriods
First, a reminder that the Public Comment Period on the CONTINUE keyword
convention will be closing soon. Second, the Public Comment Period on the the ESO HIERARCH keyword convention is now open. Detailed information about both of these conventions is available for public review and comment from the FITS registry web page at http://fits.gsfc.nasa.gov/fits_registry.html Comments about these conventions may be posted here on the FITSBITS mail exploder or the sci.astro.fits newsgroup. Minor typographical issues may be sent directly to the authors of the convention. Bill Pence (on behalf of the IAU FITS Working Group) ----------------------------------------------------------- Brief description of the HIERARCH keyword convention: Under the HIERARCH keyword convention, as originally defined by ESO, bytes 10 through 80 of the HIERARCH keyword record contain a series of ASCII strings, or tokens, that serve to hierarchically classify the keyword, followed by an equals sign ('=') which is in turn followed by the keyword value field. An optional comment field may follow the value field. The value and comment fields conform to the rules for free-format keywords, as defined in the FITS Standard document. The following is an example of this convention: HIERARCH ESO INS OPTI-3 ID = 'ESO#427' / Optical element identifier The hierarchical keywords can be mapped into variable names by concatenating the hierarchical tokens together, separating them with the full stop character. For example, the hierarchical keyword shown above corresponds to the variable name ESO.INS.OPTI-3.ID. This ESO convention can be generalized to support keyword names longer than 8 characters, or which contain ASCII characters that would otherwise be prohibited. Some examples are shown below: HIERARCH LongKeyword = 47.5 / keyword has 8 characters and mixed case HIERARCH XTE$TEMP = 98.6 / This keyword name contains the '$' character -- __________________________________________________ __________________ Dr. William Pence NASA/GSFC Code 662 HEASARC +1-301-286-4599 (voice) Greenbelt MD 20771 +1-301-286-1684 (fax) |
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