Facets

All (and Objects)

Label	Document	Index Field	Multiple	Example	Notes
Category	obj	categories	Yes	Locomotives and Rolling Stock
	doc	n/a
	agent	n/a
Date	obj	creation.date	No	1829	This facet is a to/from filter
	doc	missing	Yes	1829
	agent	birth.date / death.date	to - from	1829
User	obj	agents	Yes	Liverpool & Manchester Railway or Robert Stephenson	Could be an organisation or person (based on 'individual' field)
	doc	missing
	agent	n/a
On Display	obj	missing		Yes
	doc	n/a
	agent	n/a
Museum	obj	missing	No	NRM, SMG, NMeM, MSI	Needs to be displayed as full museum name
	doc	n/a
	agent	n/a
Location	obj	TBA	No	Gallery Name	Ideally this would use a location code and a mapping file,but now we should just use the human readable name; need to agree which value in index to use
	doc	n/a
	agent	n/a
Type	obj	terms	Yes	Thesaurus term (various sources) - for example, model locomotive or railway model	Need to decide if we use object 'name' or 'terms' (or both?); if object names we need to split on semicolon; in index. Some of the 'Term' values are legacy navigation terms (NRM Nav)
	doc	missing	Yes	Engineering
	agent	n/a
Place	obj	name + obj:terms	Yes	Manchester	Need to decide what to do when location isn't suitable for facet (ie. it's too long)
	doc	missing	Yes
	agent	n/a
Image Licence	obj	missing	Yes	CC BY-NC-SA / Commercial	There could be multiple images assigned to a record each with differing licence terms
	doc	missing	Yes	CC BY-NC-SA
	agent	missing	No	CC BY-NC-SA

People (and Organisations)

Label	Doc/Index Field	Multiple	Example	Notes
Occupation	occupation	Yes	railway engineer / civil engineer
Place born	location	No	Willington Quay
Date born	birth.date	No	1981
Date died	death.date	No	1981
Organisation	sub_type	No	'organisation' or 'person'

Documents/Archives

Label	Doc/Index Field	Multiple	Example	Notes
Archive	fonds.summary_title	No	The Babbage Archive
Format	missing	Yes	bound volume, large format document or photograph
Date	missing	Yes	1891	Could have both single and to-from values
Place	missing	Yes	London
Type	missing	Yes	Engineering	thesaurus term (UKAT)
Creator	missing	Yes	Charles Babbage
Organisation	missing	Yes	Ferranti Ltd
Image Licence	missing	Yes	CC BY-NC-SA / Commercial etc.	There could be multiple images assigned to a record each with differing licence terms

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• See 1862-5 (Rocket) for example or BAB for Archive document.
• See smgc-agent-2735 (Robert Stephenson) for example
• See: BAB/A/001 (The first drawing of the circular arrangement of the new engine) for example http://archives.sciencemuseumgroup.ac.uk/Details/archivescience/110000028