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About this documentation

This documentation is an auto-generated set of linked HTML pages that provide an overview of a domain-specific GML Application Schema model.

Detailed information about GML Application Schema development is beyond the scope of this help page, however the following section on the ISO/TC 211 Profile of UML (sourced from here) is provided to assist the reader in interpreting the behaviour of certain model Classes.

ISO/TC 211 Profile of UML

UML is the canonical notation used in the ISO 19100 series of standards for Geographic Information developed by ISO/TC 211. However, UML provides a rich palette, and even within class-diagrams the UML elements may be combined in a variety of ways to represent similar functions. In order to restrict the variability, a strict "profile" of UML is used. This is defined primarily in ISO 19103, with some contextual clarification in ISO 19109, 19118 and 19136.

The key constraints for our purposes are:

a rolename is required on every navigable association end
the default cardinality for a navigable association end or attribute is [1]
standard stereotypes are used for packages and classes, according to the following table (adapted from ISO 19136/GML 3.2 Annex E)

The first set of stereotypes corresponds primarily the set described in Table E.1 of ISO 19136:2007 (GML 3.2.1), and are suitable for a domain model that is ready for direct conversion to XML as a GML Application Schema.

Stereotype name Scope Use XML Implementation

<<ApplicationSchema>> Package Complete application schema An XML Schema in a single XML namespace

<<FeatureType>> Class Feature-type XML element whose XML Schema-type is derived from gml:AbstractFeatureType

<<Type>> Class Referenceable objects other than features XML element whose XML Schema-type is derived from gml:AbstractGMLType

<<DataType>> Class Structured data type XML element with a complex content model; does not have identity and must appear inline

<<Union>> Class Arbitrary set of alternative classes Choice group whose members are GML Objects or Features, or objects corresponding to DataTypes

<<CodeList>> Class Extensible enumeration Union of an enumeration of string values and a pattern

<<Enumeration>> Class Fixed enumeration Enumeration of string values

Stereotype name	Scope	Use	XML Implementation
<<ApplicationSchema>>	Package	Complete application schema	An XML Schema in a single XML namespace
<<FeatureType>>	Class	Feature-type	XML element whose XML Schema-type is derived from gml:AbstractFeatureType
<<Type>>	Class	Referenceable objects other than features	XML element whose XML Schema-type is derived from gml:AbstractGMLType
<<DataType>>	Class	Structured data type	XML element with a complex content model; does not have identity and must appear inline
<<Union>>	Class	Arbitrary set of alternative classes	Choice group whose members are GML Objects or Features, or objects corresponding to DataTypes
<<CodeList>>	Class	Extensible enumeration	Union of an enumeration of string values and a pattern
<<Enumeration>>	Class	Fixed enumeration	Enumeration of string values

Some additional stereotypes have been found useful in domain modelling. These are packaged as a separate "UML Profile" for use in the HollowWorld environment.

Stereotype name Scope Use XML Implementation

<<Leaf>> Package Convenient group of elements within an application schema Single XML Schema document

<<PrimitiveType>> Class Structured data type Class which has a "canonical" pre-defined XML encoding

<<property>> attribute, associationRole Property Local element (a) having a simple type (b) containing a complex type, or (c) using the GML in-line or by-reference pattern

<<multipleInheritance>> Generalization Multiple Inheritance To accommodate tagged values required for XML Schema implementation

Stereotype name	Scope	Use	XML Implementation
<<Leaf>>	Package	Convenient group of elements within an application schema	Single XML Schema document
<<PrimitiveType>>	Class	Structured data type	Class which has a "canonical" pre-defined XML encoding
<<property>>	attribute, associationRole	Property	Local element (a) having a simple type (b) containing a complex type, or (c) using the GML in-line or by-reference pattern
<<multipleInheritance>>	Generalization	Multiple Inheritance	To accommodate tagged values required for XML Schema implementation

List of known documentation limitations

Properties (i.e. attributes and associations) that are inherited from externally governed classes are not shown in class details
Local Subclasses: (as listed on Class Details pages) include only the direct descendants of the class. (i.e. deeper levels of genralization are not listed)
Class Details page only indicates extends for a single parent. (i.e. multiple inheritance is not yet supported)
Documentation of nested <<Application Schema>> packages is not yet supported. Currently the rule suite expects a parent <<Application Schema>> with child <<Leaf>> packages