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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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To learn about what's going on, see About the Archive Site.
On Oct 27, 2009, at 5:47 PM, Dennis Heimbigner wrote:
Jennifer Adams wrote:Hi, Dennis -- I'm sorry to pepper you with questions, but I think this is really important and I'm eager for the DAP interface in netcdf-4 to work well with GrADS and the GDS.No problem; I need all the feedback and bug reports and opinions I can get :-) I want to get this right.
That's good!
Well, I guess you can take my so-called expertise with a grain of salt. I confess I haven't pored over the specs. The URL prefixes are not part of the GrADS/GDS interface.Requiring prefixes on OPeNDAP URLs is inconsistent with libnc-dap and a pretty significant change to the OPeNDAP user interface.Actually, libnc-dap has always supported the prefixes, although you probably never used them.
It's a whole lot simpler for the user to change the setting in one place at one time instead of adding a prefix every time you open or query a URL.I too would like to get rid of them and hopefully the defaults will be such that user rarely need them.Can configuration options such as [fetchlimit=1] be parsed from the user's .dodsrc file instead?This is an open issue here in the netcdf group. Historically, the use of environment variables or .rc files has been avoided in favor of various flag setting extensions to the interface.
Also, if client-side cacheing is disabled, will that append the '? varname[constraints]' syntax to requests like 'GET model.dods'? -- JenniferYes, it will ask for a specific variable only and will do so using dap projection constraints.
> ncdump -h [fetchlimit=1]http://monsoondata.org:9090/dods/model ncdump: No match. Is that how the prefix is supposed to be used? --Jennifer
=Dennis Heimbigner
-- Jennifer M. Adams IGES/COLA 4041 Powder Mill Road, Suite 302 Calverton, MD 20705 jma@xxxxxxxxxxxxx
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