'variable:Expression datatype'

http://finregont.com/fro/xbrl/formula/variable.ttl#ExpressionDatatype
Class 'variable:Expression datatype'

rdf:type

rdfs:Datatype

rdfs:label

Expression datatype

rdfs:subClassOf

xsd:string

owl:equivalentClass

xsd:string[xbrl_all:pattern "[\xbrl_all:s]*[\xbrl_all:S]+[\xbrl_all:s\xbrl_all:S]*"]

References
as rdfs:subClassOf (variable:Precondition, variable:Parameter, variable:General variable, variable:Fact variable, variable:Equality definition)