| Life cycle data for process plant: Reference data for observations and measurements | ISO/WD 15926-x:200x(E) |
For each observations and measurements object there is the following:
A description by natural language text within clause 4.
For most objects, the form of the definition is:
'An object is an X if and only if < condition >.'
This definition specifies necessary and sufficient conditions. Hence the class X consists of all things that satisfy the criterion and nothing else.
A set of computer interpretable formats contained in Annex C. These computer interpretable formats represent only the relationships between objects, and do not repeat the natural language text definitions.
The computer interpretable formats are as follows:
The relationships with other geometric and topological objects, and with entities in ISO 15926-2, are recorded as a set of EXCEL spreadsheets.
The relationships with other geometric and topological objects are recorded as a set of OWL ontologies.
The appropriate fragment of an ontology is included as a note within a text
description. For example, the text description of
observing_activity has the note:
NOTE 2 OWL specification:
--> <owl:Class rdf:about="&iso15926-x;observing_activity"> <rdfs:subClassOf rdf:resource="&iso15926-2;activity"/> <rdfs:isDefinedBy rdf:resource="&iso15926-x-doc;/observing_activity.htm#observing_activity"/> </owl:Class> <!--
The classes defined in ISO 15926-2 that are referenced by this part of ISO 15926 are as follows:
Subclasses of the class iso15926-2:activity are defined in this part of ISO 15926. These subclasses are members of iso15926-2:class_of_activity.
Subclasses of the class iso15926-2:possible_individual are defined in this part of ISO 15926. These subclasses are members of iso15926-2:class_of_individual.
Members of the class iso15926-2:class_of_individual are defined in this part of ISO 15926.
Subclasses of the class iso15926-2:physical_object are defined in this part of ISO 15926. These subclasses are members of iso15926-2:class_of_individual.
NOTE 1 The class iso15926-2:possible_individual also has subclasses iso15926-2:materialized_physical_object and
iso15926-2:functional_physical_object, which are referenced in examples within this part of ISO 15926.
This part of ISO 15926 defines many subclasses of iso15926-2:relationship. The subclasses are members of iso15926-2:class_of_relationship.
NOTE 2 The class basics:mapping is a subclass of iso15926-2:relationship and basics:structure.
A whole-part iso15926-2:relationship between instances of iso15926-2:possible_individual
is a subclass of iso15926-2:composition_of_individual. The whole-part iso15926-2:relationship can be temporal or spatial.
This part of ISO 15926 regards relationships as directional, so that iso15926-2:composition_of_individual is refered to as iso15926-2:has_part or iso15926-2:part_of.
A iso15926-2:composition_of_individual that is purely temporal.
This part of ISO 15926 regards relationships as directional, so that iso15926-2:temporal_whole_part is refered to as iso15926-2:has_temporal_part or iso15926-2:temporal_part_of.
Subclasses of the class iso15926-2:spatial_location are defined in this part of ISO 15926. These subclasses are members of iso15926-2:class_of_individual.
Subclasses of the class iso15926-2:period_in_time are defined in this part of ISO 15926. These subclasses are members of iso15926-2:class_of_individual.
An observing_activity observes an iso15926-2:indirect_property of a iso15926-2:possible_individual.
Within this part of ISO 15926, iso15926-2:indirect_property is refered to as "physical property".
An observing_activity can determe the iso15926-2:property that is the value taken by an iso15926-2:indirect property of a iso15926-2:possible_individual at an
instant.
Within this part of ISO 15926, iso15926-2:property is refered to as a "physical quantity".
This part of ISO 15926 refers to iso15926-2:thing. A iso15926-2:thing can be mentioned in a formula.
This part of ISO 15926 defines information_content to be a subclass of iso15926-2:class_of_information_representation.
The classes defined in ISO 15926-3 that are referenced by this part of ISO 15926 are as follows:
Members of the class basics:mapping are defined in this part of ISO 15926. They are also members of iso15926-2:class_of_relationship.
Members of the class basics:function are defined in this part of ISO 15926. They are also members of iso15926-2:class_of_relationship.
The classes defined in ISO 15926-4 that are referenced by this part of ISO 15926 are as follows:
An alternative definition and the alternative name information_content is given by this part of ISO 15926.
The class observation_device is defined as a superclass of iso15926-4:detecting_instrument in this part of ISO 15926.
A member of the class indicator can be a part of a member of the class iso15926-4:detecting_instrument.
NOTE 1 The class iso15926-4:transmitter is relevant to this part of ISO 15926. A definition in the style of this part of ISO 15926 is as follows:
An object is a
iso15926-4:transmitterif and only if:
- it is a
iso15926-2:physical_object;- it is intended to receive a
signaland to send asignalwith the sameinformation_contentto a remote receiver.OWL specification:
--> <owl:Class rdf:about="&iso15926-4;transmitter"> <rdfs:subClassOf rdf:resource="&iso15926-2;physical_object"/> </owl:Class> <!--
NOTE 2 The class iso15926-4:detecting_element is relevant to this part of ISO 15926. A definition in the style of this part of ISO 15926 is as follows:
An object is a
iso15926-4:detecting_elementif and only if:
- it is a
iso15926-2:physical_object;- it is intended to respond to a physical phenonmenon and produces a
signalthat depends upon the presence or the magnitude of the phenomenon.This class is equivalent to "detector" as defined by SensorML.
A
iso15926-4:detecting_elementcan be aclock.OWL specification:
--> <owl:Class rdf:about="&iso15926-4;detecting_element"> <rdfs:subClassOf rdf:resource="&iso15926-2;physical_object"/> </owl:Class> <!--
NOTE 3 References to quantities and scales defined within ISO 15926-4 are made by examples within this part of ISO 15926.
The reference data is organized into subsets, which are documented in subclauses as follows.
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