Sorry I hit the send button by accident. Yes, this is a very real question for us. If we make a new dataset from say two JPL files, JPL is no longer the creator, first because they didn't create it, but even more to say they are are the creator is to imply that they have put their stamp of approval on the product, which they have not. At the same time, we want to give proper credit that the new file was created from say two JPL files.
Out of all these fields, we have been debating what is the most appropriate way to do so. -Roy > On Jan 20, 2017, at 6:20 PM, John Graybeal <jbgrayb...@mindspring.com> wrote: > > Hi all, > > Over on the ACDD (esip-documentation) list, we started a thread to answer > some questions about ACDD attributes. One question related to the 3 CF > attribute definitions for source, institution, and history (documented in > http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/ch02s06.html#description-of-file-contents); > I believe ACDD slavishly follows the CF definitions so this list seems the > authority. > > I’ve copied that bit of the ACDD thread below for context. (In that thread > JPL provided initial data, and ERD processes those data to create the ‘new’ > data set that’s being documented.) But the question boils down to the > following. > > Do CF source, institution, and history attributes all document the ‘new’ data > set, referred to in CF as the current file? (Please note that in some > definitions, like institution, this is called “the original data”.) This is > what the introduction to the section seems to say. But if this ‘new’ data set > *is* "the original data”, how can there be any “modifications to the original > data” as described in the history definition? > > Thanks very much for your input, and apologies for the cross-posting. > > John > > >>> source: Should this be info what JPL did since original data is specified >>> in the definition (below) >>> 'The method of production of the original data. If it was model-generated, >>> source should name the model and its version, as specifically as could be >>> useful. If it is observational, source should characterize it (e.g., " >>> surface observation " or " radiosonde “)' >> >> As ’source’ comes directly from the CF conventions, I went back to those >> definitions, and I’m still not sure. (See also the next two items.) If no >> one on this list sounds authoritative, I suggest you send a question to the >> CF conventions list (mailto:cf-metadata@cgd.ucar.edu, subscribe at >> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata). Actually, I’ll do >> that now, just so the CF folks are aware of the question. >> >>> institution: JPL nice original data is specified >>> 'Specifies where the original data was produced’ >> >> Will be the same answer as source. I would have agreed with you, but then >> the history definition (next) seems to suggest otherwise. >>> >>> history: where we describe modifications to the original data. >>> 'Provides an audit trail for modifications to the original data. >>> Well-behaved generic netCDF filters will automatically append their name >>> and the parameters with which they were invoked to the global history >>> attribute of an input netCDF file. We recommend that each line begin with a >>> timestamp indicating the date and time of day that the program was executed’ >> >> So the relevant CF section for source, institution, and history is >> http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/ch02s06.html#description-of-file-contents. >> While the definitions for institution (’Specifies where the original data >> was produced’) is almost certainly describing the current file’s >> institution, the history is ‘an audit trail for modifications to the >> original data’. If this file _is_ the original data, I don’t see how there >> can be any modifications to it yet, I would call this a CF issue (and we of >> ACDD carefully avoided messing with CF definitions, as I recall), so maybe >> that group needs to weigh in. > > > > --------------------------------------- > John Graybeal > jbgrayb...@mindspring.com > linkedin: http://www.linkedin.com/in/johngraybeal/ > > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ********************** "The contents of this message do not reflect any position of the U.S. Government or NOAA." ********************** Roy Mendelssohn Supervisory Operations Research Analyst NOAA/NMFS Environmental Research Division Southwest Fisheries Science Center ***Note new street address*** 110 McAllister Way Santa Cruz, CA 95060 Phone: (831)-420-3666 Fax: (831) 420-3980 e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/ "Old age and treachery will overcome youth and skill." "From those who have been given much, much will be expected" "the arc of the moral universe is long, but it bends toward justice" -MLK Jr. _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
