Re: dataset branching (a la git)

Hi Jurgen,

c.f. "Mapping Golden Rule" page 11 (https://www.niem.gov/training/Documents/Mod13_NIEM_PI_Mapping.pdf)

We come from the same place (SQL) :-)  The problem lies with a necessary Outer Join of rows on columns if the classification system is lacking conjugate pairs of meta data values in rows and columns.  Linear Combinations of rows are "arbitrarily close" to a unit (identity) martix, as are Linear Combinations of columns, but they aren't the same Combinations.  Don't tell any spooks, it makes them depressed and sour.
--Gannon
--------------------------------------------
On Thu, 10/2/14, Jürgen Jakobitsch <j.jakobitsch@semantic-web.at> wrote:

 Subject: dataset branching (a la git)
 To: public-lod@w3.org
 Date: Thursday, October 2, 2014, 3:02 PM
 
 hi,
 when trying to classify the animals on
 pictures from a recent trip to eastern
 indonesiameticulously realized that it is very
 hard if not impossible to branch datasets with
 ease.while this might sound ignoreable at first
 sight it might as well be the reason for the giant global
 graph to develop a culture of duplicating and linking with
 the end effect of being very close to where we came from
 (many sql databases).
 what i mean will hopefully become clear with a
 simple example :
 
 the "manta birostris" (giant oceanic manta ray) is
 classified 
 
 her wikipedia.org
 asKingdom:	AnimaliaPhylum:	ChordataClass:	ChondrichthyesSubclass:	ElasmobranchiiOrder:	MyliobatiformesSuborder:	MyliobatidaeFamily:	MobulidaeGenus:	MantaSpecies:	Manta
 birostris
 here http://www.catalogueoflife.org/col/browse/tree/id/18879368
 asKingdom: AnimaliaPhylum:
 ChordataClass: ElasmobranchiiOrder:
 MyliobatiformesFamily:
 MyliobatidaeGenus: MantaSpecies: Manta
 birostris
 here http://www.marinespecies.org/aphia.php?p=browser&id=105755#ct
 asKingdom: AnimaliaPhylum:
 ChordataSubphylum:
 VertebrataSuperclass:
 GnathostomataSuperclass Pisces
 (Unreviewed)Class: Elasmobranchii
 (Unreviewed)Subclass: Neoselachii
 (Unreviewed)Infraclass: Batoidea
 (Unreviewed)Order: RajiformesFamily:
 Myliobatidae (Unreviewed)Subfamily:
 MobulinaeGenus: MantaSpecies: Manta
 birostris
 here http://data.gbif.org/species/2419163/
 asKingdom: AnimaliaPhylum:
 ChordataClass: ElasmobranchiiOrder:
 MyliobatiformesFamily:
 MyliobatidaeGenus: MantaSpecies: Manta
 birostris
 if only in theory we would triplify all these
 datasets and link them it still would be very hard to find
 out what different people think about the actually same
 being.
 now:
 my thinking was to create a flat list of uris for
 => all <= these classifications and create branches
 (graphs) with the hierarchies. but it is not as simple as it
 sounds because i cannot make the sparql engine follow a
 branch at certain uris and the rejoin the master graph again
 by whatever means. neither can i do such things on data
 level.
 i was thinking about like so [1] on a triple
 (quad) level.
 questions:
 
 1. is the problem described so that it is at least
 semi-understandable (or should i come up with some triples
 as example)2. has this problem already been dealt
 with and i was only missing that day (please provide a
 link)3. has this problem already been solved and
 i was only missing that day (please provide a
 link)4. do you think it is worth dealing
 with     (i personally think so [think:
 scaling cooperation ])5. would be a of enough
 interest to create a wg
 any pointers and thoughts highly
 appreciatedwkr turnguard
 
 [1] http://nvie.com/posts/a-successful-git-branching-model/
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Received on Thursday, 2 October 2014 20:56:08 UTC