PSchema Roadmap and Features

[angelip2303]

Wikibase/DataModel

See the data model of Wikibase for further information on the structure of the data to be handled by pschema-rs.

Values

First, regarding Values, which are the basic objects representing a particular thing, ranging from Literal or DataValues, to Entities, holding a DataType, an Item and a Property. According to the following schema:

The following table summarizes the supported Values:

Feature	Supported	Comments
DataValue	✔
Entity	✔
DataType	✔
Item	✔
Property	✔

Datatypes

Second, a finite set of datatypes are supported by Wikibase. According to this, for the purpose of this library, a simplification of the Wikibase set of accepted types can be implemented. For the whole picture of the set of Wikibase datatypes, see:

Regarding the supported DataTypes, the set of accepted ones is as follows:

Feature	Supported	PSchema Representation
StringValue	✔	String
QuantityValue	✔	Quantity
MonolingualTextValue	✔	String
TimeValue	✔	DateTime
MultilingualTextValue	✔	String
GeoCoordinatesValue	✔	Coordinates
IriValue	❌	ShapeReference

Statements

The Statements describe the claim of a statement; that is, it establishes relationships between entities. The complete structure is described as follows:

Regarding the supported features, the currently implemented ones can be seen in the following table:

Feature	Supported	Comments
Statement	✔
Qualifiers	❌

WShEx

Regarding the main features supported by WShEx schemas, the currently supported functionalities can be seen in the following table:

Feature	Supported	PSchema Representation
Triple constraints	✔	TripleConstraint, ShapeAnd, ShapeOr
Cardinality	✔	Cardinality
Labels, descriptions and aliases	❌
Value sets	✔	ShapeOr
Bult-in DataTypes	✔	ShapeLiteral
Facets	❌
Qualifiers	❌
References	✔	ShapeReference
Ranks	❌
SiteLinks	❌

Data import/export

pschema-rs can operate with data in several formats, the currently supported ones can be seen in the table below:

Feature	Supported	Comments
DuckDB Import	✔
DuckDB Export	🕒	Even if it's planned, we are waiting for the pola-rs release
Parquet Import	❌
Parquet Export	✔
NTriples Import	✔
NTriples Export	✔