Identifiers External package abbreviations Abbreviated terms

21 Copyright © 2016 Open Geospatial Consortium Schematron files explicitly specify which requirements are being tested in the title of the Schematron pattern. pattern id = origin_elevation title Test requirement: reqgwml2-well-xsdorigin_elevation title rule context = gwml2w:GW_Well assert test = countgwml2w:gwWellReferenceElevationgwml2w:Elevation[gwml2w:elevationTypexlink: href=http:www.opengis.netreqgwml2-wellorigin_elevation] = 1 A GW_Well needs at least one origin Elevation assert rule pattern

5.4 Identifiers

Each requirements class, requirement and recommendation is identified by a URI. The identifier supports cross-referencing of class membership, dependencies, and links from each conformance test to the requirements tested. In this specification identifiers are expressed as partial URIs or paths, which can be appended to a base URI that identifies the specification as a whole in order to construct a complete URI for identification in an external context. The URI for each requirements class has the form http:www.opengis.netspecgroundwaterml2.1req[classM]. The URI for each requirement or recommendation has the form http:www.opengis.netspecgroundwaterml2.1req[classM][reqN]. The URI for each conformance class has the form http:www.opengis.netspecgroundwaterml2.1conf[classM]. The URI for each conformance test has the form http:www.opengis.netspecgroundwaterml2.1conf[classM][testN].

5.5 External package abbreviations

Concepts from schemas defined in some other International Standards are designated with names that start with alpha codes as follow: GF ISO 19109:2005 General Feature Model GFI ISO 19156:2011 General Feature Model Instances TM ISO 19108:2002 Temporal Schema, Temporal Objects 22 Copyright © 2016 Open Geospatial Consortium MD ISO 19115 Metadata CV ISO 19123:2005 Schema for Coverage Geometry and Functions OM ISO 19156:2011 Observations and Measurements DQ ISO 19157:201X Data Quality WML2 OGC® WaterML 2.0: Part 1- Timeseries GW GroundwaterML 2.1

5.6 Abbreviated terms

In this document the following abbreviations and acronyms are used or introduced: API Application Program Interface GeoSciML3.2 GeoScience Mark-up Language version 3.2 GML OGC Geography Mark-up Language GWML2 Groundwater Markup Language version 2.1 this specification GWML2-Main UML Logical Model of the primary GroundWaterML2 elements namespace http:www.opengis.netgwml-main2.1 GWML2-Flow UML Logical Model of the elements required to capture groundwater flow namespace http:www.opengis.netgwml- flow2.1 GWML2-Constituent UML Logical Model of the groundwater fluid body constituents and their relationships namespace http:www.opengis.netgwml-constituent2.1 GWML2-Well UML Logical Model of the features and properties associated with water well namespace http:www.opengis.netgwml- well2.1 GWML2-WellConstruction UML Logical Model of the well drilling and construction details namespace http:www.opengis.netgwml- wellconstruction2.1 GWML2-AquiferTest UML Logical Model of the features and properties associated with aquifer test namespace http:www.opengis.netgwml- aquifertest2.1 ISO International Organization for Standardization NACSN North American Commission on Stratigraphic Nomenclature 23 Copyright © 2016 Open Geospatial Consortium NADM North American Geological Data Model OGC Open Geospatial Consortium OM OGC Observations and Measurements Conceptual Model OMXML Observations and Measurements XML Implementation SensorML Sensor Model Language SOS Sensor Observation Service SWE Sensor Web Enablement UML Unified Modeling Language UTC Coordinated Universal Time URI Universal Resource Identifier URL Universal Resource Locator WML2 WaterML 2.0 – Part 1 XML Extensible Markup Language XSD W3C XML Schema Definition Language

5.7 UML notation