<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi,<div><br><div><div>On Apr 3, 2014, at 1:28 PM, Tom Kuiper <<a href="mailto:kuiper@jpl.nasa.gov">kuiper@jpl.nasa.gov</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">I remember seeing something like that a few years ago when I was working<span class="Apple-converted-space"> </span></span><br style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">on this issue but had forgotten. As I recall, the suggestion was to<span class="Apple-converted-space"> </span></span><br style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">provide a URL for a repository with the detailed information. I had<span class="Apple-converted-space"> </span></span><br style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">some concerns about that though. For example, can we count on the<span class="Apple-converted-space"> </span></span><br style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">website being maintained? A complete FITS header, at least, will exist<span class="Apple-converted-space"> </span></span><br style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span style="font-family: GillSans; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">as long as the FITS file exists.</span></blockquote></div><div><br></div><div>I think this is *exactly* the correct solution. This is how HTML and XML are handled. For example, a web page might begin with:</div><div><br></div><div><div><html xmlns="<a href="http://www.w3.org/1999/xhtml">http://www.w3.org/1999/xhtml</a>" xml:lang="en-US" lang="en-US"></div></div><div><br></div><div>Here, the XML namespace is described and documented at the URL provided. You are correct that these documents can't be stored at random ethereal web sites, but instead should be hosted specifically at <a href="http://fits.gsfc.nasa.gov">http://fits.gsfc.nasa.gov</a>, where the format lives (just as <a href="http://w3.org">w3.org</a> is where the web standards live).</div><div><br></div><div>The URL would be placed in the primary header user a specific keyword (e.g. FITSDICT) and then defined as part of the standard. For existing files, someone who is motivated can create a logic tree to determine which dictionary should be used given the headers present. This tree should be language independent.</div><div><br></div><div>Cheers,</div><div>Demitri</div><br><div apple-content-edited="true">
<div>_________________________________________<br>Demitri Muna<br><br>Department of Astronomy<br>Der Ohio State University<br><br><a href="http://scicoder.org/">http://scicoder.org/</a><br><br><br></div></div></div></body></html>