| UK-EA-TS | No | The UK Environmental Agency developed he EA Time Series Data Exchange format (UK-EA-TS) to exchangea variety of sets of time-series data, primarily hydrologic data. |
| UML | No | Unified Modeling Language |
| URI | No | Uniform Resource Identifier - A string of characters used to identify or name a resource on the Internet. |
| URN | No | Uniform Resource Name |
| USGS | No | United States Geological Survey. |
| Vocabulary | Yes | A set of variable codes that are being managed by an organization. While this functionality has not yet been implemented, it is hoped that eventually this information can be used to automatically tag the variables. When configuring a WaterOneFlow web service, the default vocabulary identifier for that service must be selected. This is one of two identifiers that must be selected when installing a WaterOneFlow web service. The other one is: Network. For more information see: Server, Network and Vocabulary Naming System. |
| WaterOneFlow | Yes | A web service that produces WaterML. It includes the following methods:
GetSiteInfo — Given a site number, this method returns the site's metadata as an XML text.
GetSiteInfoObject — Given a site number, this method returns the site's metadata as an object.
GetSites — Given an array of site numbers, this method returns the site metadata for each one as an object for WaterOneFlow 1.0, and as text for WaterOneFlow 1.1.
GetSitesObject — Given an array of site numbers, this method returns the site metadata for each one as an object. Applies to WaterOneFlow 1.1.
GetSitesXml — Given an array of site numbers, this method returns the site metadata for each one as XML text. Applies to WaterOneFlow 1.0
GetVariableInfo — Given a variable code, this method returns the variable's name as an object.
GetVariableInfoObject — Given a variable code, this method returns the variable's siteName as an object.
GetValues — Given a site number, a variable, a start date, and an end date, this method returns a time series as XML text.
GetValuesObject — Given a site number, a variable, a start date, and an end date, this method returns a time series as an object.
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| W3C | No | World Wide Web Consortium |
| WATERS Network | No | A joint initiative among the environmental engineering and science, hydrologic and related Earth science, and social science research communities and funded by the National Science Foundation (NSF), aims to provide opportunities to advance our scientific understanding of water as an integrated resource and develop the national capability needed to predict water quality and quantity everywhere at all times. For more info see: http://www.watersnet.org/ |
| WATERS Test Bed Sites | No | As part of the WATERS Network planning process, NSF has funded 11 WATERS Test Bed projects to test various aspects of observatory design and operation. These two-year projects will be developing technologies ranging from collection of data from floating sensors to determining optimal placement of real-time nitrate sensors. Test Bed sites are located in a range of environmental conditions from the high Sierra Nevada to urban Baltimore. The sites will act as beta test locations for the deployment of CUAHSI HIS project server capability that will enable the Test Beds to archive and publish their own data in a standardized relational database schema known as the Observations Data Model (ODM). For more information see: http://www.watersnet.org/wtbs/ |
| Water Data Federation | Yes | See CUASHI Water Data Federation. |
| Water Data Service | Yes | A WaterOneFlow web service and it's associated data store. |
| Water Quality Data Elements List | No | A standard list of water quality parameters developed by the National Water Quality Monitoring Council which is part of an advisory group to the USGS. There is both a list and a user's manual for the list. See http://acwi.gov/methods/data_projects/index.html for more infomration. |
| WaterML | Yes | Water Markup Language; An XML schema for transmitting water data. Produced by WaterOneFlow web services. |
| WCS | No | Web Coverage Services – An OGC standard for serving geospatial "coverages". The term "grid coverages" typically refers to content such as satellite images, digital aerial photos, digital elevation data, and other phenomena represented by values at each measurement point. THREDDS services are web coverage services. |
| WDTF | No | Water Data Transmission Format – XML schema for water data transmission developed by the Austrailian government's Bureau of Meteorology. |
| Web Coverage Service | No | An OGC standard for serving geospatial "coverages". The term "grid coverages" typically refers to content such as satellite images, digital aerial photos, digital elevation data, and other phenomena represented by values at each measurement point. |
| Web Feature Service | No | An OGC standard for serving geographical features over the internet. |
| Web Map Service | No | An OGC standard for serving georeferenced map images over the internet. |
| Web Service | No | A Web service is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format (specifically WSDL). Other systems interact with the Web service in a manner prescribed by its description using SOAP-messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards. |
| WFS | No | Web Feature Services - An OGC standard for serving geographical features over the internet. |
| WISE | No | Water Information System for Europe |
| WMO | No | The World Meteorological Organization (WMO) is a specialized agency of the United Nations. It is the UN system's authoritative voice on the state and behaviour of the Earth's atmosphere, its interaction with the oceans, the climate it produces and the resulting distribution of water resources. See http://www.wmo.int for more information. |
| WMS | No | Web Map Services - An OGC standard for serving georeferenced map images over the internet. |
| WQX | No | Water Quality Exchange - A data exchange schema for partners to share ambient water quality data with the U.S. EPA for inclusion in it's STORET database. |
| WSDL | No | Web Service Definition Language |
| XHydro | No | An XML standard for transmission of water level data through web services for the German Federal Waterways and Shipping Administration. It goes slightly further in the it specifies an XML schema for the encoding of eneric times series, with an extension that is tailored specifically for water level and discharge data. It also contains a generic conceptual model from which other schemas can be created to address particular needs. |
| XMI | No | XML Metadata Interchange |
| XML | No | eXtensible Markup Language |