[esip-semantictech] ACDD vocab as RDF

[Jonathan.Yu at csiro.au]

This came out of work we've been doing to develop netCDF-LD. We are developing a standard and a toolkit to encode RDF graphs from netCDF (meta)data to start enabling data fusion, data discovery, and other use cases. However, we identified a few gaps.

The challenge we hit was the many conventions used to encode information in netCDF don't have stable web identifiers (ie. URIs). These are often described in documentation but often not machine readable/check-able (though CF has a checker). Our WG identified in the context of netCDF, that CF and ACDD were important conventions to be able to describe netCDF-LD graphs with. There are others of course...

We're at a point where we can generate these graphs, but there is limited infrastructure to support their identity (though for CF standard names - NERC and MMI have done some work in this area). 

Ultimately, we'd like to be able to provide SPARQL endpoints to accompany the netCDF files and provide semantic querying/inferencing. This could sit alongside their access via THREDDS/Hyrax for example. 

A new and parallel piece of work we're embarking on is to develop a tool that can take a set of netCDF files and output schema.org flavoured RDF graphs (in RDF or JSON-LD). These could then be served as landing pages or accompany the archived files. Some wiki notes here on the mapping: https://github.com/binary-array-ld/bald/wiki/Schema.org-mappings

The learning is that most of ACDD maps to schema.org, so it should be quite a straightforward task.

Regards,
Jonathan

-----Original Message-----
From: esip-semanticweb [mailto:esip-semanticweb-bounces at lists.esipfed.org] On Behalf Of Mcgibbney, Lewis J (398M) via esip-semanticweb
Sent: Wednesday, 7 November 2018 8:24 AM
To: esip-semanticweb at lists.esipfed.org
Subject: Re: [esip-semantictech] ACDD vocab as RDF

Hi Jonathan,
Very interesting stuff. Yes, I am sure it could easily align with future discussion on advancing schema.org within the ESIP SemTech community. 
Publishing through COR is great as it offers you the ability to establish an IRI for each field in the CSV. Additionally, you can set your COR entry up such that it automatically updates whenever a new update is made to the remote resource.
Can you provide some insight into what you'll be using this for? Would be nice to get that context.
Thanks for posing Jonathan.

    Today's Topics:
    
       1. ACDD vocab as RDF (Jonathan.Yu at csiro.au)
    
    
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    Message: 1
    Date: Mon, 5 Nov 2018 02:37:00 +0000
    From: <Jonathan.Yu at csiro.au>
    To: <esip-semanticweb at lists.esipfed.org>
    Cc: <mark.hedley at metoffice.gov.uk>, <Adam.Leadbetter at Marine.ie>,
    	<ajelenak at hdfgroup.org>
    Subject: [esip-semantictech] ACDD vocab as RDF
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    	<395566434dc84ddb9b10f766968b8d4c at exch1-mel.nexus.csiro.au>
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    Hi all,
    
    I've been observing the list for a while, but today have something to share that might be of interest to this mailing list.
    
    I'm part of a working group developing a netCDF Linked Data (netCDF-LD) standard with tools over at https://binary-array-ld.github.io/netcdf-ld/
    
    As part of this work, we've identified an opportunity for the ACDD vocabulary to be 'triplified' with stable identifiers hosted by ESIP. This would greatly help our efforts in providing a translation pathway from netCDF files (using ACDD and CF) into RDF and RDF profiles/flavours (like schema.org). This might hook into some of the discussion about schema.org and future work by ESIP Sem Web...
    
    To this end, I'd like to share some initial work to turn the ACDD convention documented at (http://wiki.esipfed.org/index.php/Attribute_Convention_for_Data_Discovery_1-3) into CSV.
    
    This is being developed over at https://github.com/ESIPFed/acdd (see PR https://github.com/ESIPFed/acdd/pull/2).
    
    The aim is to eventually publish through the COR. I have a test repo at http://cor.esipfed.org/ont/~jyu/test-acdd .
    
    We'd appreciate any feedback or contributions to this work. An ambitious target would be to have this stabilised by Christmas :)
    
    Regards,
    Jonathan
    
    p.s. if you're interested, see https://github.com/binary-array-ld/bald/wiki/Schema.org-mappings for an initial schema.org mapping.
    
    
    


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