classifications to be supported

• ISCO68
• ISCO88
  • ILO eurostat/RAMON
  • COM eurostat/RAMON, Ganzeboom)
• ISCO08, ILO
• KldB1975 arbeitsagentur.de
• KldB88, arbeitsagentur.de
• KldB92, destatis/Klassifikationsserver
• KldB2010, arbeitsagentur.de/KldB2010
• DKZ
• WZ2003 (two digits), destatis/Klassifikationsserver
• WZ2008 (two digits), destatis/Klassifikationsserver
• Nace Rev 1 (1990, two digits), eurostat/RAMON
• Nace Rev 1.1 (2002, two digits), eurostat/RAMON
• Nace Rev 2 (2008, two digits), eurostat/RAMON

Possible data structures for sources, try to use terms from XKOS:

scheme_id	label	cross	Text	URL(s) Overview	URL Used Table	commit-comment	validfrom
KldB2010	Klassifikation der Berufe 2010		Prosa	arbeitsagentur.de/destatis.de		first version	2017-03-01
KldB2010	Klassifikation der Berufe 2010		Prosa	arbeitsagentur.de/destatis.de		one item removed, a second one added	2017-04-20
ISCO88-ILO	International blub		Prosa	ILO
ISCO88-Ganze	International Ganzeboom	SIOPS	SPSS-Script bla bla	ganzeboom.nl...

Possible data structure for classifications:

versioning by duplication:

scheme_id	concept	label	validfrom
KldB2010	12435	Berufblub	2017-03-01
KldB2010	12345	Berufblub	2017-03-01
KldB2010	12346	Berufbla	2017-03-01
KldB2010	12435	Berufblub	2017-04-20
KldB2010	12345	Berufblub	2017-04-20
KldB2010	12347	Berufblablubb	2017-04-20
EGP	1	Klasse I
EGP	2	Klasse II

versioning by instroducing/deprecation:

scheme_id	concept	label	deprecated	introduced
KldB2010	12435	Berufblub	.	2017-03-01
KldB2010	12345	Berufblub	.	2017-03-01
KldB2010	12346	Berufbla	2017-04-19	2017-03-01
KldB2010	12347	Berufblablubb	.	2017-04-20
EGP	1	Klasse I
EGP	2	Klasse II

Possible data structure for crosswalk operations:

input_scheme_id	input_concept	output_schme_id	output_concept	prob
KldB2010	12345	EGP	1	1
KldB2010	12346	EGP	1	0,5
KldB2010	12346	EGP	2	0,5