week18.txt

Week 18 (27.04.-03.05.)
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[~] familiarize yourself w/ some tooling

	[x] run all queries from ulo paper in virtuoso

	[~] import all data into graphdb

		[x] import coq data into graphdb

		-> had to use a little scritping to remove some
		invalid(?!) parts from the rdf files

		-> used script /ulo/coq-cut.sh

		[~] import isabelle data into graphdb

		-> importing the isabelle rdf files I get an error

			org.eclipse.rdf4j.sail.SailException: Invalid IRI value

		   for all files; I wonder if the proposed IRI
		   scheme is actually illegal; will have to
		   look into that

		-> RDF [1] uses IRIs which "are a generialization of URI [2]";
		   IRIs are also defined by the IETF [3]

		-> looking at the grammar of IRIs [3], it indeed seems like the
		   pipe symbol as used by the ULO exports is in fact not allowed
		   in IRIs; to quote the IRI grammar

		      iunreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~" / ucschar

		   where ucschar defines various regions of unicode
		   characters; the lowest of the range is 0xa0, which
		   is below 0x7c (the pipe symbol)

	[ ] run all quries from ulo paper in graphdb

[ ] fix exported IRIs

[ ] familiarize w/ MathHub infastructure

	[ ] look at tooling; user interface &c

	[ ] look at programming interfaces

	[ ] evaluate databases for integration w/ MathHub

References
==========


[1] https://www.w3.org/TR/2014/REC-rdf11-concepts-20140225/
[2] https://tools.ietf.org/html/rfc3986
[3] https://tools.ietf.org/html/rfc3987