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ISO 19107:2003, Geographic Information — Spatial schema ISO 19108:2006, Geographic Information — Temporal schema
ISO 19109:2006, Geographic Information — Rules for application schemas ISO 19115:2012, Geographic Information — Metadata – Fundamentals Draft
4. Terms and definitions
For the purposes of this document, the following terms and definitions apply. The HY_Features model uses as far as possible the terminology recommended for use in
the WMO Member countries and represented by the “UNESCOWMO International Glossary of Hydrology” [1].Whenever an appropriate definition is provided in this
glossary, the model captures this meaning and relationships to define relevant features and feature properties.
4.1 application schema
conceptual schema for data required by one or more applications [ISO 19101].
NOTE: In general, a schema is an abstract representation of an objects characteristics and relationship to other objects. An XML schema represents the relationship between the attributes and elements of an
XML object for example, a document or a portion of a document
4.2 basin
hydrologic unit wherein all incoming water is channeled to a common outlet.
NOTE: The common outlet of a basin may be a particular location, but also a body of water. It may be a real place or a fictive one built from joining several places.
4.3 catchment
distinct unit catching something, e.g. water.
NOTE: Across scientific disciplines in the domain of hydrology, a catchment is commonly recognized as the basic unit of study and reporting. .
4.4 domain feature
feature of a type defined within a particular application domain. [ISO19156]
4.5 feature
abstraction of real-world phenomena [ISO19101]
4.6 hydrographic network
aggregate of water bodies, aggregated using a connecting system.
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4.7 hydrography
science dealing with the description and measurement of open bodies of water. [WMO1992]
NOTE: In this context, hydrography refers to the description of water bodies. Its measurement in terms of surveying, e.g. for navigational purposes, is not in the concern of the HY-Features model.
4.8 hydrologic feature
