DIN EN ISO 19143:2012-06

This International Standard describes a system neutral syntax for expressing projections, selection and sorting clauses collectively called a query expression. These components are modular and intended to be used together or individually by other standards which reference this International Standard. The standard also describes an XML and KVP encoding of a system-neutral representation of a select clause. The XML representation is easily validated, parsed and transformed into a server-specific language required to retrieve or modify object instances stored in some persistent object store. This International Standard defines the XML encoding of metadata that allows a service to declare which conformance classes, predicates, operators, operands and functions it supports. This metadata is referred to as Filter Capabilities. The committee responsible for this standard is NA 005-03-03 AA "Kartographie und Geoinformation (SpA zu CEN/TC 287+ISO/TC 211)" ("Cartography and geographic information (Mirror Committee of CEN/TC 287+ISO/TC 211)") at DIN.