Concept Properties

Some concepts, such as for example, catalog sub-objects or templates, are not just standardized keywords, but also have properties associated with them. ChemConnect defines these properties in a few standardized ways to give additional information about the concept and are key to their display within the ChemConnect interface.

Properties as ontology class 'Restrictions'

Properties are added to concepts through ontology class restrictions. For example:

owl:onProperty is used to define the restriction, in this case cube:concept. In this case, the concept is linked to the concept dataset:HeatFluxBurnerBurnerDimensions.

The property (restriction) can be specified in two ways:

• Single: The property is only used once.
• Multiple: The property can be repeated several times.

In the example given above, the property is singular. This is given by a singular cardinality:

The meaning of this is that there is a single property of cube:concept of type dataset:HeatFluxBurnerDimensions.

The following example specifies a multiple property:

The property (owl:onProperty) of a dcat:record of dataset:DataSetReference can be multiply repeated using the specification:

The meaning of this property specification is that there can be multiple references (this is found in the definition information of a standard Catalog object).

Interface Interpretations of single concepts

The above screenshot is an interpretation of ParameterSpecification which is made up of several singular quantities:

• ParameterTypeSpecification: Measure
• ParameterLabel: dataset:IgnitionDelayTime
• ValueUnits: TimeUnit (in this case, the properties of the units includes the specific unit of ms)
• concept: FundamentalExperimentalMeasurement
• hasPurpose: ExperimentalIgnitionDelayTime

This is specified in the definition of the ontology class ParameterSpecification:

The concept and hasPurpose is defined in the ParameterSpecification superclass DataSpecification.

The template of the domain object IgnitionDelayTime shown in the interface is given by:

with the specification of the concept (ExperimentalIgnitionDelayTime) and its superclass (rdfs:subClassOf) TimeParameter:

for the template of units (qudt:unitSystem of qudt:TimeUnit) and hasPurpose (FundamentalExperimentalMeasurement).

Interface Interpretations of Multiple Properties

In the ChemConnect definition of the SubSystemDescription catalog object, multiple ParameterValue objects are used to description the subystem attributes. This is specified by:

Within a template description of, for example the Heat Flux Burner, a set of attribute templates are listed: