This document describes the Shape Expression Vocabulary and Term definitions used for describing Shape Expressions [[shex-semantics]]. This document provides the RDFS [[RDF-SCHEMA]] vocabulary definition and a description of the JSON-LD context definition for use with defining shape expressions.
Alternate versions of the vocabulary definition exist in
which also includes the
@context required for metadata descriptions.
This document describes the RDFS vocabulary description used in the Shape Expression Language (ShEx) [[shex-semantics]] along with the default JSON-LD Context and shape expression to validate RDF versions of shapes.
This specification makes use of the following namespaces:
The following are class definitions in the
Annotations provide a format-independent way to provide additional information about elements in a schema.
A TripleExpression composed of one or more sub-expressions, all of which must match.
An IRI prefix used for matching IRIs.
An IRI prefix (or wildcard) along with a set of excluded values, used for node matching.
An Language prefix used for matching Literal Languages.
An Language prefix (or wildcard) along with a set of excluded values, used for node matching.
An Literal prefix used for matching Literals.
An Literal prefix (or wildcard) along with a set of excluded values, used for node matching.
A constraint on the type or value of an RDF Node.
The set of kinds of RDF Nodes.
A TripleExpression composed of one or more sub-expressions, one of which must match.
A Schema contains the set of shapes, used for matching a focus node.
A list of Semantic Actions that serve as an extension point for Shape Expressions. They appear in lists in Schema's startActs and Shape, OneOf, EachOf and TripleConstraint's semActs.
A shapes schema is captured in a Schema object where shapes is a mapping from shape label to shape expression.
A ShapeExpression composed of one or more sub-expressions, all of which must match.
The abstract class of Shape Expressions.
A reference to a shape defined in some external Schema.
A ShapeNot is satisfied when it’s included ShapeExpression is not satisfied.
A ShapeExpression composed of one or more sub-expressions, one of which must match.
Abstract class for Stems
Abstract Class for Stem Ranges
A constraint on a triple having a specific predicate and optionally a shape expression used for matching values.
The abstract class of Triple Expressions.
Indicates that a stem is a Wildcard, rather than a URI prefix.
The following are property definitions in the
Annotations on a TripleExpression.
Indicates that a Shape is closed, meaning that it may contain no property values other than those used within TripleConstraints.
Code executed by Semantic Action.
A datatype constraint.
Values that are excluded from value matching.
Expression associated with the TripleExpression.
List of 2 or more expressions associated with the TripleExpression.
Properties which may have extra values beyond those matched through a constraint.
Regular expression flags
for "fractiondigits" constraints, v is less than or equals the number of digits to the right of the decimal place in the XML Schema canonical form[xmlschema-2] of the value of n, ignoring trailing zeros.
Constrains the subject of a triple, rather than the object.
The exact length of the value of the cell.
Maximum number of times this TripleExpression may match; -1 for “*”
An atomic property that contains a single number that is the maximum valid value (exclusive).
An atomic property that contains a single number that is the maximum valid value (inclusive).
A numeric atomic property that contains a single integer that is the maximum length of the value.
Minimum number of times this TripleExpression may match.
An atomic property that contains a single number that is the minimum valid value (exclusive).
An atomic property that contains a single number that is the minimum valid value (inclusive).
An atomic property that contains a single integer that is the minimum length of the value.
Identifier of SemAct extension.
Restiction on the kind of node matched; restricted to the defined instances of NodeKind. One of shex:iri, shex:bnode, shex:literal, or shex:nonliteral.
Abstract property of numeric facets on a NodeConstraint.
The object of an Annotation.
A regular expression used for matching a value.
The predicate of a TripleConstraint or Annotation.
Semantic Actions on this TripleExpression.
Shape Expression referenced by this shape.
A list of 2 or more Shape Expressions referenced by this shape.
Shapes in this Schema.
A ShapeExpression matched against the focus node prior to any other mapped expressions.
Semantic Actions run on the Schema.
A stem value used for matching or excluding values.
An abstract property of string facets on a NodeConstraint.
for "totaldigits" constraints, v equals the number of digits in the XML Schema canonical form[xmlschema-2] of the value of n
A ShapeExpression used for matching the object (or subject if inverted) of a TripleConstraint.
A value restriction on a NodeConstraint.
An abstract property of string and numeric facets on a NodeConstraint.
The following are datatype definitions in the
The following are instance definitions in the
Requires node to be a Blank Node
Requires node to be an IRI
Requires node to be an rdf:Literal
Requires node to be a Blank Node or IRI