The SPASE ontology can be expressed in many forms. One of those forms is as an XML Schema. An XML Schema expresses the constraints on the structure and content of an XML document. Typically an XML Schema is stored in a file with an ".xsd" extension.
When constructing an XML document the schema is referenced from the enclosing tag. For a SPASE document the enclosing tag has the form:
<Spase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.spase-group.org/data/schema" xsi:schemaLocation="http://www.spase-group.org/data/schema http://www.spase-group.org/data/schema/spase-2_0_1.xsd">The "schemaLocation" maps the target namespace (in this case "http://www.spase-group.org/data/schema") to a schema document. There exists an XML Schema document for each version of the SPASE data model.
Current Release is 1.0.0, released: 2017-11-09