Group Mailing list Archive

11 Apr 2016

Re: [rda-datafabric-ig][rda-collection-wg] Re: [rda-datafabric-ig][rda-collection-wg] Some thoughts on "Data Aggregations" terminology & concepts

Dear Jeremy, all
here, as far as I can see from a first look, the definition is relying
on the binary predicate /isGatheredInto/(/x/,/y/), which I couldn't find
to be defined at the given location anymore. So one probably cannot use
this as a definition here, without defining how this predicate function
works in all cases.
But the other way around: if one uses my reductionist definition, the
function /isGatheredInto/(/x/,/y/) is almost trivially to define,
because one just looks, whether PID y is contained in the set of PIDs in

11 Apr 2016

Re: [rda-datafabric-ig][rda-collection-wg] Some thoughts on "Data Aggregations" terminology & concepts

Hello Ulrich,
thank you for the examples - I particularly like the power collection
idea as it could solve very aesthetically some of the issues we get into
once we talk about collections that grow over time but yet should be
somewhat statically referable. I think this also has a new twist on the
API: A rule-based collection might need its own dedicated querying and
creation mechanisms (or at least different parameter sets). When
thinking in terms of collection models, I mostly worked along lines of

11 Apr 2016

Re: [rda-datafabric-ig][rda-collection-wg] Some thoughts on "Data Aggregations" terminology & concepts

Hi Tobias, Gary and others,
in principle each function, that generates (new) collections, could be
used. For example from a given collection one could build a new
collection by requiring restrictions like for example time constraints
on the generation of the DOs it contains. Or one can build a kind of
power collection, the collection of all sub collections.
Particularly interesting generation rules come with the possibity of
following the links given in the collection, either by the PIDs in the

10 Apr 2016

Some thoughts on "Data Aggregations" terminology & concepts

The various types of data aggregation and what we call them has been a topic in several RDA groups.  "Data set/dataset" or "Digital Collection" and "data series" are a few of the frequently used terms.  In the DFT WG snapshot document we had an initial definition of  "Digital Collection" as:

A digital collection is an aggregation which contains DOs and DEs. The collection is identified by a PID and described by metadata.

Note: A digital collection is a (complex) DO.

17 Mar 2016

REMINDER: National Data Service Consortium Workshop - April 4-6, 2016

All, just wanted to bring to everyone’s attention the next U.S. National Data Service workshop coming up in April. One of the aims of this workshop will be to highlight a number of the U.S. software/tools efforts that would be components of a National Data Service.
Kenton McHenry, Ph.D.
Senior Research Scientist, Adjunct Assistant Professor of Computer Science
Deputy Director of the Scientific Software & Applications Division
National Center for Supercomputing Applications
Click here to see this online
[National Data Service]

03 Mar 2016

Data Fabric and PIT updates

Dear DF and PIT,
I understand that there have been some questions during one of the Data
Fabric session at P7 today on the status and future of the PIT
developments. Since PIT is considered to be part of the overall Data
Fabric approach, I would like to take this opportunity to give a few
essential updates here that shed some light on the more recent
activities since the end of the WG lifetime:
- The PIT API and demonstrator are available as an RDA recommendation
and I am quite happy to see that there are a couple of adoption projects

23 Feb 2016

WG: RDA Plenary 7 - 1 March IG Data Fabric, IG National Data Services Schedule Change

Dear all,
there will be a change in the program on Tuesday 1. March
The two data fabric related sessions will be exchanged – see below.
Von: Hilary Hanahoe [mailto:***@***.***]
Gesendet: Dienstag, 23. Februar 2016 09:53
An: Wittenburg, Peter; ***@***.***; ***@***.***; Amir Aryani; Adrian Burton; Kevin Ashley (DCC)
Cc: Parsons, Mark Alan; ***@***.***; Timea Biro

08 Feb 2016

AW: [rda-datafabric-ig] R: [rda-datafabric-ig] dfig-terms

Thanks Stefano and Keith,
Is the stuff you are talking about Keith written down somewhere? How to move ahead?
The FAIR folks are suggesting to agree on a formal language to represent metadata etc.
It seems that my old CLARIN people describe categories (concepts) with help of SKOS and they use this “component” approach with a registry of components (sub-schemas) allowing everyone to re-use these components or adapt them to their needs. Of course RDF can or is being created for whatever purposes.