Re: Intrinsic vs extrinsic metadata (my action #54)

Hello Mark,

Thank you very much for sharing your thoughts about metadata definition.

I read your notes on the wiki page and I have some comments:

- I agree with you that a dataset may be described by two types of
metadata. The metadatas that describes the data itself (intrinsic one) and
the metadata that describes the dataset (extrinsic metadata). In the
diagram that I showed in the last meeting, I called them structural and
descriptive metadata.

- I believe that intrinsic properties are the ones that describe the
meaning of the data itself, like concepts, classes and properties.
Intrinsic metadata has a similar role of a database schema and should be
described by a domain vocabulary.

- In this case,  Scope (temporal and geographic) and Granularity (temporal
and spatial) should be considered extrinsic properties, once they describe
the dataset instead of the meaning of data. Extrinsic properties should be
described by standard vocabulariies like DCAT, PROV and the Quality and
Data Usage vocabularies.

Maybe I'm being too strict with this classification, but on the other hand
I think this may help the understanding of the different types of metadata
and their roles on describing a dataset.

I'm sending attached a new version of the diagram that I showed on our last
meeting. In this new version, I included more subclasses (access,
granularity and scope) for the extrinsic metadata. I believe that now it is
possible to define the properties (intrinsic and extrinsic) described in
your notes.

It would be great if you could take a look at the diagram and tell me if
these ideas make sense to you.

Thanks again!

kind regards,
Bernadette



2014-07-01 10:29 GMT-03:00 Mark Harrison <mark.harrison@gs1.org>:

>  Dear DWBP colleagues,
>
>  I've added a section to the DWBP wiki with some thoughts about intrinsic
> vs extrinsic metadata, in response to my action #54 from last Friday's call
> and the initial discussion there.
>
>  I've now added that section at
>
>
> https://www.w3.org/2013/dwbp/wiki/Guidance_on_the_Provision_of_Metadata#Intrinsic_vs_Extrinsic_Metadata
>
>  Maybe it's not the best place for it - in which case, I'm happy for the
> editors to move it to a better location in the Wiki.
>
>  It's not definitive either - more of a discussion about the kinds of
> metadata that is intrinsic to the data itself (irrespective of format or
> access mechanism) and other kinds of metadata that is extrinsic (e.g.
> depends on a particular format, access mechanism or licence).
>
>  Please feel free to modify this and extend it.
>
>  I hope that it's useful for the discussions that Bernadette and I were
> having last week, as well as the work Hadley is writing about alternative
> approaches to data catalogues.
>
>  At least it might help us to ensure that we explore the various
> 'dimensions' of metadata that might be used by data consumers when
> searching for datasets or discovering related datasets.  I have also
> included some ideas about capturing feedback about data usage (e.g. in
> applications, websites, mash-ups), including links to related datasets that
> add some valuable context.
>
>  Feel free to develop this further if you think it is useful.
>
>  Best wishes,
>
>  - Mark
>
>
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-- 
Bernadette Farias Lóscio
Centro de Informática
Universidade Federal de Pernambuco - UFPE, Brazil
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