date union A datatype that is the union of date datatypes. literal A general purpose property for holding string literals as a machine-readable string for how the enumerated value can be referred to. This can be used when the code value is numeric, as an alternative to using a code. Literal is not the same as label which is intended for human readable display. For example, a code for January may be 1, the literal may be 'J' or 'jan' and the label 'January'. default object value The property "dtype:defaultValue" is a general property for specifying an object value in situations where none is specified. 1 author 1 value The property "dtype:value" is a general property for specifying a literal value in situations where none is specified. datatype code A unique value that is assigned to an enumeration member. A property for expressing a unique value for a member of an enumeration. The range has been set to "xsd:anySimpleType" to allow for any scalar datatype. http://www.linkedmodel.org/doc/2023/SCHEMA_dtype 2023-11-14 Datatype Schema (DTYPE) - Version 2.1 DTYPE Version 2.1 Metadata http://www.linkedmodel.org/schema/dtype# 2023-11-14 The ontology "dtype" provides a specification of simple data types such as enumerations and codelists. These are needed in support of the conversion of XML Schemas and UML Models to OWL. The purpose of "dtype" is to provide a foundation for expressing rich data types. These data types are typically needed when dealing with OWL representations of data structures derived from XML Schema. DTYPE http://www.linkedmodel.org/doc/2015/SCHEMA_dtype-v1.2 http://www.linkedmodel.org/lib/lm/images/logos/dtype_logo-300x110.png The purpose of DTYPE is to provide, by import, a foundation for data types. DTYPE is issued under a Creative Commons Attribution Share Alike 3.0 United States License. DTYPE Schema Version 2.1 Metadata 2.1 2011-05-29 LinkedModel.org http://www.linkedmodel.org/dtype/schema/SCHEMA_dtype.ttl dtype refers to An indirection pointer for relating a slot in am occurrence data structure, such as "dtype:ValueReference" with another resource. 1 numeric union A datatype that is the union of numeric xsd data types. "dtype:numericUnion" is equivalent to the xsd specification that uses an xsd:union of memberTypes="xsd:decimal xsd:double xsd:float xsd:integer". A type that serves as a container for the enumerated values of an enumeration. This enables the enumeration itself to be referenceable. One need for this is in determing the default value of an enumeration. Another need is in the management of sub-enumerations and composite enumerations. DTYPE Enumeration 1 has member A property for specifying how member elements make up a data structure. composite of A property for constructing composite data structures default value The property "dtype:defaultValue" is a general property for specifying a literal value in situations where none is specified. Value Reference A value reference is a pointer to an Enumerated Value. The original order of the value can be overridden by the "order" attribute. object value The property "dtype:objectValue" is a general property for specifying an object value in situations where none is specified. is invalid A boolean flag to state that a value is invalid with respect to its type. Datatype Ontology Datatype Ontology Datatype Schema Ralph Hodgson order The property "dtype:order" provides a means to specify a precedence. One use of order is in specifying ordered enumerations such as "voag:ConfidentialityLevel". A similar property, but with an important type difference, is "vaem:orderIndex". This is for use on property occurrences in class axioms where it can be placed on a restriction to specify how that property may be transformed into other representations where ordering has some importance, for example, in XML Schema sequences. Whereas "vaem:order" is a datatype property, "vaem:orderIndex" is an annotation property. The "order" property specifies a value that can establish precedence and ordinality. One use of order is in make an enumeration an ordinal type. For example "RiskLevel" might have the values "very low", "low", "medium", "high" and "very high". A query that asks for all risks that are greater than "medium" would use the ordinal values and return those resources that have “medium”, “high” and “very high” ordinality. Codelist A codelist is a controlled vocabulary of terms that are used to represent permissible values of a variable in information systems. The representaiton of codes in "dtype" has been influenced by CCTS and UBL. A derived codelist is a sublist of another codelist. The members that it has must be members of the source list. Derived Code List Composite Code List A composite codelist is a codelist made up of other codelists. It does not introduce any new codes. DTYPE Enumerated Value The base class for datatypes that have values that are restriced to a set of literals or tokens. The members of the restriction may themselves be restriced by facets that apply to scalar data types. 1 1 1 1 1 order index The property "dtype:orderIndex" is an annotation property to specify a position that some value or structure will have. One use is to specify the place that a resource has in a sequence. Another use is on property occurrences in class axioms, where "vaem:orderIndex" is placed on a restriction to specify how that property may be transformed into a representation where ordering has some importance, for example, in XML Schema sequences. Simple Code List A simple codelist is one made up only of enumerated values. derived from A property for specifying a derivation relationship.