Target Namespace | http://www.opengis.net/gml |
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Version | 3.2.0 |
Language | en |
Element and Attribute Namespaces |
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Schema Composition |
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Documentation | See ISO/DIS 19136 13.2. The reference systems schema components have two logical parts, which define elements and types for XML encoding of the definitions of: - Identified Object, inherited by the ten types of GML objects used for coordinate reference systems and coordinate operations - High-level part of the definitions of coordinate reference systems This schema encodes the Identified Object and Reference System packages of the UML Model for ISO 19111. |
Application Data | referenceSystems.xsd More information at: urn:ogc:specification:gml:schema-xsd:referenceSystems:3.2.0. |
Prefix | Namespace |
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Default namespace | http://www.w3.org/2001/XMLSchema |
xml | http://www.w3.org/XML/1998/namespace |
gml | http://www.opengis.net/gml |
gmd | http://www.isotc211.org/2005/gmd |
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Name | AbstractCRS |
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Type | gml:AbstractCRSType |
Nillable | no |
Abstract | yes |
Documentation | gml:AbstractCRS specifies a coordinate reference system which is usually single but may be compound. This abstract complex type shall not be used, extended, or restricted, in a GML Application Schema, to define a concrete subtype with a meaning equivalent to a concrete subtype specified in this document. |
Name | crsRef |
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Type | gml:CRSPropertyType |
Nillable | no |
Abstract | no |
Documentation | gml:crsRef is an association role either referencing or containing the definition of a CRS. This property element has been deprecated. |
Name | domainOfValidity |
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Type | Locally-defined complex type |
Nillable | no |
Abstract | no |
Documentation | The gml:domainOfValidity property implements an association role to an EX_Extent object as encoded in ISO/TS 19139, either referencing or containing the definition of that extent. |
Name | scope |
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Type | string |
Nillable | no |
Abstract | no |
Documentation | The gml:scope property provides a description of the usage, or limitations of usage, for which this CRS-related object is valid. If unknown, enter "not known". |
Super-types: | gml:DefinitionType < IdentifiedObjectType (by extension) < AbstractCRSType (by extension) |
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Sub-types: | None |
Name | AbstractCRSType |
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Abstract | yes |
Super-types: | None |
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Sub-types: | None |
Name | CRSPropertyType |
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Abstract | no |
Documentation | gml:CRSPropertyType is a property type for association roles to a CRS abstract coordinate reference system, either referencing or containing the definition of that CRS. |
Super-types: | gml:DefinitionType < IdentifiedObjectType (by extension) |
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Sub-types: |
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Name | IdentifiedObjectType |
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Abstract | yes |
Documentation | gml:IdentifiedObjectType provides identification properties of a CRS-related object. In gml:DefinitionType, the gml:identifier element shall be the primary name by which this object is identified, encoding the "name" attribute in the UML model. Zero or more of the gml:name elements can be an unordered set of "identifiers", encoding the "identifier" attribute in the UML model. Each of these gml:name elements can reference elsewhere the object's defining information or be an identifier by which this object can be referenced. Zero or more other gml:name elements can be an unordered set of "alias" alternative names by which this CRS related object is identified, encoding the "alias" attributes in the UML model. An object may have several aliases, typically used in different contexts. The context for an alias is indicated by the value of its (optional) codeSpace attribute. Any needed version information shall be included in the codeSpace attribute of a gml:identifier and gml:name elements. In this use, the gml:remarks element in the gml:DefinitionType shall contain comments on or information about this object, including data source information. |
Super-types: | Address < AusAddress (by extension) |
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Sub-types: |
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Name | AusAddress |
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Abstract | no |
The XML Instance Representation table above shows the schema component's content as an XML instance.
Abstract (Applies to complex type definitions and element declarations). An abstract element or complex type cannot used to validate an element instance. If there is a reference to an abstract element, only element declarations that can substitute the abstract element can be used to validate the instance. For references to abstract type definitions, only derived types can be used.
All Model Group Child elements can be provided in any order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-all.
Choice Model Group Only one from the list of child elements and model groups can be provided in instances. See: http://www.w3.org/TR/xmlschema-1/#element-choice.
Collapse Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32). Then, collapse contiguous sequences of space characters into single space character, and remove leading and trailing space characters.
Disallowed Substitutions (Applies to element declarations). If substitution is specified, then substitution group members cannot be used in place of the given element declaration to validate element instances. If derivation methods, e.g. extension, restriction, are specified, then the given element declaration will not validate element instances that have types derived from the element declaration's type using the specified derivation methods. Normally, element instances can override their declaration's type by specifying an xsi:type
attribute.
Key Constraint Like Uniqueness Constraint, but additionally requires that the specified value(s) must be provided. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.
Key Reference Constraint Ensures that the specified value(s) must match value(s) from a Key Constraint or Uniqueness Constraint. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.
Model Group Groups together element content, specifying the order in which the element content can occur and the number of times the group of element content may be repeated. See: http://www.w3.org/TR/xmlschema-1/#Model_Groups.
Nillable (Applies to element declarations). If an element declaration is nillable, instances can use the xsi:nil
attribute. The xsi:nil
attribute is the boolean attribute, nil, from the http://www.w3.org/2001/XMLSchema-instance namespace. If an element instance has an xsi:nil
attribute set to true, it can be left empty, even though its element declaration may have required content.
Notation A notation is used to identify the format of a piece of data. Values of elements and attributes that are of type, NOTATION, must come from the names of declared notations. See: http://www.w3.org/TR/xmlschema-1/#cNotation_Declarations.
Preserve Whitespace Policy Preserve whitespaces exactly as they appear in instances.
Prohibited Derivations (Applies to type definitions). Derivation methods that cannot be used to create sub-types from a given type definition.
Prohibited Substitutions (Applies to complex type definitions). Prevents sub-types that have been derived using the specified derivation methods from validating element instances in place of the given type definition.
Replace Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32).
Sequence Model Group Child elements and model groups must be provided in the specified order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-sequence.
Substitution Group Elements that are members of a substitution group can be used wherever the head element of the substitution group is referenced.
Substitution Group Exclusions (Applies to element declarations). Prohibits element declarations from nominating themselves as being able to substitute a given element declaration, if they have types that are derived from the original element's type using the specified derivation methods.
Target Namespace The target namespace identifies the namespace that components in this schema belongs to. If no target namespace is provided, then the schema components do not belong to any namespace.
Uniqueness Constraint Ensures uniqueness of an element/attribute value, or a combination of values, within a specified scope. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.