Data schema

This is the basic schema that will be used to store text-mining annotations in ScienceSource. See notes below.

Property table

Property code	Property label	Type of field	Notes
P2	Wikidata item code	External identifier	Needs formatter URL set as https://www.wikidata.org/wiki/$. Check documentation, see needed string property below.
P3	instance of	Item	Equivalent of P31 on Wikidata
P4	subclass of	Item	Equivalent of P279 on Wikidata
P6	preceding anchor point	Item
P7	following anchor point	Item
P8	distance to preceding	Quantity
P9	distance to following	Quantity
P10	character number	Quantity	Offset from the initial annotation point in the article. If not a robust figure, adequate for the project. The text version saved as the article here will be the "SI standard".
P11	article text title	String	Not disambiguated (see P20).
P12	anchor point in	Item	Refers back to underlying article.
P13	preceding phrase	String	(1) Subject to a character limit (2) Initially may have some tags (3) Initially not constrained by spaces; certainly, though, from the point of view of human readability, should not have breaks in the middle of words
P14	following phrase	String	As for P13
P15	term found	String	Word or phrase from dictionary, mentioned in text and starting at anchor point
P16	dictionary name	String	ScienceSource dictionary as named, date tracked by P17 for version
P17	publication date	Point in time	For articles
P18	length of term found	Quantity	String length of term, pre-computed for use in offsets and constraint checking
P19	based on	Item	For an item that is instance of annotation, "based on" has as object the anchor point or annotation it is based on. Therefore this is a child-parent type of property, defining the tree of annotations growing out of a given anchor point. As a constraint, every annotation is required to have such a statement.
P20	ScienceSource article title	String	Identifies article, by disambiguated title, for human readability. Because of disambiguation, this title will not always coincide with other versions of the title, such as given by P11. There could also be a cross-namespace version of this property that was lyingly based on "external identifier".
P22	time code	Point in time	MediaWiki UTC code, set by creation time for batch (approximate, needed for batch tagging)
P24	anchors	Item	Partial inverse property of P19.
P25	Page ID	Quantity	MediaWiki page identifier.
P26	is subject of a Wikidata triple with object	Item	Drug annotations can be linked to disease annotations when the text states that a Wikidata P2175 statement on Wikidata holds. (Such statements may then be converted into annotations.)
P27	Wikidata property in a claimed triple	String	Identifies the Wikidata property in a claimed triple (default P2175)
P28	Wikidata subject item	String	Identifies the Wikidata subject in a claimed triple
P29	Wikidata object item	String	Identifies the Wikidata object in a claimed triple
P30	human has checked	Item	For fact-checking, could be used as a bot intermediate to an annotation, depending on implementation
P31	supersedes	Item	Expresses the dominance relation between reviews, for clinical purposes
P32	include only after	Quantity	For filtering annotations by restriction to part of an article, by offset
P33	include only before	Quantity	For filtering annotations by restriction to part of an article, by offset
P34	deprecation for reason	Item	For fine-grained analysis of reasoning that a review should fail MEDRS, in terms of publication type ontology
P35	passed MEDRS	Point in time	For recording with a time-stamp the acceptance of a "fact found" annotation by the MEDRS algorithm
P36	failed MEDRS	Point in time	For recording with a time-stamp the rejection of a "fact found" annotation by the MEDRS algorithm
P?	formatter URL	string	Equivalent of P1630 on Wikidata . See mail thread on configuration https://lists.gt.net/wiki/mediawiki/887858
P?	(not yet defined)

Notes

1. For "type of field" see https://www.wikidata.org/wiki/Help:Data_type. For data types available on ScienceSource, see http://sciencesource.wmflabs.org/wiki/Special:ListDatatypes.
2. This table now uses "P" for the property prefix. As of October 2018, a Phabricato rthread on using another prefix is still active -T202676.
3. The schema will be extended, in particular for checking annotations.
4. The project will comply with the W3C Web Annotation Data Model of February 2017. The annotations will be stored here in a Wikibase site, so that inherently they are available in RDF. In principle several dumps will be available from the site, such an RDF of all annotations and other data here, and a dump just of the annotations directly pointing to the articles (i.e. none of the community-added annotations, or of the auxiliary data). What we mean by compliance to the standard will be the availability in principle of the annotations, in the W3C-recommended JSON format.

Item table

Item code	Item label	Comments
Q2	anchor point	Anchor points are where initial annotations hang off articles, and are first-class entities in ScienceSource ontology. We use stand-off annotation, so that nothing is actually inserted into articles. Notionally an anchor point is a place you could find in the article text in an article with your cursor, so for example any place between two letters. In practice anchor points will typically be between a space and an alphanumeric character.
Q4	article	Wikibase indexation of the Article: namespace; also serves as initial anchor point for each article.
Q5	annotation	An annotation must hang off (a) an anchor point, or (b) another annotation.
Q6	terminus	Terminal marker defined uniformly for all articles. The actual final anchor point in an article will be the one linking to Q6, i.e. having a P7 statement with object Q6.
Q7	demo article item
Q8	demo anchor point item
Q9	demo annotation item
Q6818	dictionary item