SensorML OGC 12-000
Copyright © 2014 Open Geospatial Consortium
125
sml:SimpleProcess gml:id
= thresholdClipperConfigured
definition =
http:sensors.wsprocessthresholdClipper --
============================= --
-- Threshold Clipper Descriptions
-- --
============================= --
gml:description A process that passes values of 15.0 and above to the passValue output;
gml:description gml:identifier
codeSpace =
uid urn:myCompany:swe:process:0678b365a
gml:identifier gml:name
Threshold Clipper 01 Configured gml:name
sml:typeOf xlink:title
= urn:net:swe:process:thresholdClip01
xlink:href =
http:sensors.wsprocessesThresholdClipper01 sml:configuration
sml:Settings sml:setValue
ref =
parametersthreshold 15.0
sml:setValue sml:Settings
sml:configuration sml:SimpleProcess
sml:component sml:ComponentList
sml:components --
======================================= --
-- Aggregate process links declared
-- --
======================================== --
sml:connections sml:ConnectionList
-- Connect AggregateProcess input to LinearInterpolator scale input
-- sml:connection
sml:Link sml:source
ref =
inputsvalueIn sml:destination
ref =
componentsscaleinputsx sml:Link
sml:connection --
Connect LinearInterpolator scale output to ThresholdClipper clip input --
sml:connection sml:Link
sml:source ref
= componentsscaleoutputsy
sml:destination ref
= componentsclipinputsvalueIn
sml:Link sml:connection
-- Connect ThresholdClipper clip passValue output to AggregateProcess passValue output
-- sml:connection
sml:Link sml:source
ref =
componentsclipoutputspassValue sml:destination
ref =
outputsvalueOut sml:Link
sml:connection --
Note: ThresholdClipper clip failValue output is ignored in this example --
sml:ConnectionList sml:connections
sml:AggregateProcess
8.3.2 Components The components property and the ComponentList elements are XML Schema
implementations of the UML classes defined in clause 7.4. The components property
Copyright © 2014 Open Geospatial Consortium
126 takes a ComponentList as its value. The ComponentList component property takes an
AbstractProcess as its value. Thus any SensorML process can be a component of an aggregate process, whether that process is itself simple or aggregate, non-physical or
physical. The XML snippet for the ComponentList element and its corresponding complex types is
shown below:
element name
= ComponentList
type =
sml:ComponentListType substitutionGroup
= swe:AbstractSWE
complexType name
= ComponentListType
complexContent extension
base =
swe:AbstractSWEType sequence
element name
= component
minOccurs =
1 maxOccurs
= unbounded
annotation documentation
A description of a component of the aggregate process. If by reference, the uniqueID of the referenced process must be provided using the xlink:title attribute while the URL to
the process description must be provided by the xlink:href attribute. documentation
annotation complexType
complexContent extension
base =
sml:AbstractProcessPropertyType attribute
name =
name type
= NCName
use =
required extension
complexContent complexType
element sequence
extension complexContent
complexType complexType
name =
ComponentListPropertyType sequence
minOccurs =
element ref
= sml:ComponentList
sequence attributeGroup
ref =
swe:AssociationAttributeGroup complexType
The component process can be described inline or be referenced through the xlink:href property. For a reference to an external process description, two pieces of information are
required in order to reference a component process instance, the uniqueID of the process and a resolvable URL referencing the process description. These should be provided by
the xlink:title and xlink:href attributes, respectively.
Requirement
http:www.opengis.netspecsensorml2.0reqxmlaggregate-processcomponent-reference
Req 65. When the value of the component property is “byReference”, there shall be meaningful values for the xlink:title and xlink:href attributes. The uniqueID of
the referenced process, given by its gml:identifier property, shall be the value of the xlink:title attribute, while a resolvable URL to the referenced process
description shall be the value of the xlink:href attribute.
SensorML OGC 12-000
Copyright © 2014 Open Geospatial Consortium
127 The examples in Section 8.3.1 show that the components of an aggregate process can be
fully described inline, or be externally referenced processes that are configurable.
8.3.3 Connections
