ISO/TS 10303-16:2021
(Main)Industrial automation systems and integration — Product data representation and exchange — Part 16: Description methods: SysML XMI to EXPRESS transformation
Industrial automation systems and integration — Product data representation and exchange — Part 16: Description methods: SysML XMI to EXPRESS transformation
This document specifies a mapping of SysML (ISO/IEC 19514:2017) constructs to EXPRESS (ISO 10303-11:2004) elements for the purpose of representing SysML model represented in XMI (ISO/IEC 19509:2014) as EXPRESS (ISO 10303-11:2004) schemas. The specified mapping is a one-way transformation from SysML information model represented in XMI into an EXPRESS schema. NOTE Due to this limitation 10303-16 does not define the transformation of arbitrary SysML models to EXPRESS. The following are within the scope of this document: — the transformation of SysML metamodel constructs represented in XMI to EXPRESS elements for the purpose of representing SysML information models as EXPRESS schemas. The following are outside the scope of this document: — the transformation of SysML metamodel constructs into EXPRESS elements that are not used in the STEP Extended Architecture. NOTE The STEP Extended Architecture is defined in References [8], [9] and [10]. — the transformation of SysML metamodel constructs into EXPRESS elements for other purposes than representing SysML constructs as STEP concepts; — codes and scripts to transform SysML XMI to EXPRESS schema; — the transformation of SysML constraints (OCL[5]) into EXPRESS global and local rules; — the transformation of EXPRESS elements into SysML constructs.
Systèmes d'automatisation industrielle et intégration — Représentation et échange de données de produits — Partie 16: Titre manque
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TECHNICAL ISO/TS
SPECIFICATION 10303-16
First edition
2021-07
Industrial automation systems
and integration — Product data
representation and exchange —
Part 16:
Description methods: SysML XMI to
EXPRESS transformation
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.1.1 Terms and definitions for generic concepts . 2
3.1.2 Terms and definitions for SysML constructs . 3
3.2 Abbreviated terms . 5
4 SysML XMI to EXPRESS. 5
4.1 General . 5
4.2 Presentation conventions . 5
4.3 Common mapping conventions . 5
4.3.1 Reference to external files . 5
4.3.2 xmi:id, xmi: uuid, and UUID . 6
4.3.3 Assumed sysml:Blo ck in fragments . 6
4.3.4 Containment and reference relationship . 6
4.3.5 Used stereotypes to represent STEP concepts . 6
4.3.6 Select type not treated as SysML supertype. 7
4.4 Mapping of the primary schema . 7
4.5 Mapping of Entities . 7
4.5.1 General mapping of Entity . 7
4.5.2 Mapping of abstract entity . 7
4.5.3 Mapping of entity with one supertype . 8
4.5.4 Mapping of entity with multiple supertypes . 8
4.6 Mapping of simple type . 9
4.7 Mapping of aggregation type .11
4.8 Mapping of aggregation of aggregation type.12
4.9 Mapping of Select type .13
4.9.1 General mapping of select type .13
4.9.2 Mapping of select type containing value type .14
4.10 Mapping of enumeration type .15
4.11 Mapping of entity attribute .15
4.11.1 Mapping of multiplicity and optionality .16
4.11.2 Attribute typed as an Entity .18
4.11.3 Attribute typed as Select .18
4.11.4 Attribute typed as Enumeration type .19
Annex A (normative) Information object registration .20
Annex B (informative) EXPRESS/Information modelling constructs and the equivalent
SysML modelling constructs .21
Bibliography .33
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 184, Automation systems and integration,
Subcommittee SC 4, Industrial data.
A list of all parts in the ISO 10303 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
Introduction
ISO 10303 is an International Standard for the computer-interpretable representation and exchange
of product data. The objective is to provide a neutral mechanism capable of describing product data
throughout the life cycle of a product and independent from any particular system. The nature of this
description makes it suitable not only for neutral file exchange, but also as a basis for implementing and
sharing product databases and archiving.
10303-16 is a member of the description methods series. This document specifies a mapping of SysML
XMI to the EXPRESS language.
The STEP APs Domain models and the STEP Core Model are information model layer components that
are part of the STEP Extended Architecture. These components are developed using SysML. In the past
STEP information models were developed using the EXPRESS language. For legacy reasons it is therefore
required to provide an EXPRESS schema derived from the SysML domain model. It is mandatory that
the transformation from the SysML model to the EXPRESS schema is defined by a reference standard
and guarantee a repeatable process applicable to future application protocols developments.
The Object Management Group (OMG) has standardized the XML Metadata Interchange specification
(XMI) that integrates the OMG Systems Modeling Language (SysML), the OMG Unified Modeling
Language (UML), the OMG Meta-Object Facility (MOF) and the World Wide Web Consortium (W3C)
Extensible Markup Language (XML) standards. SysML inherits the XMI interchange capability from
UML. XMI is a mechanism for the interchange of metadata between UML-based modeling tools and MOF-
based metadata repositories. OMG has also standardized an XMI compliant interchange format for the
SysML thus specifying a lexical representation of SysML models based on a standardized metamodel
of the SysML. That lexical representation includes, among other things, the ability to interchange data
type information, class information (or entities), groupings of classes providing namespaces for the
classes (or schemas), associations between classes and inheritance between classes (or subtypes).
ISO has standardized the EXPRESS language (ISO 10303-11:2004). It is used to specify information
requirements in ISO 10303.
10303-16 specifies a description method of the STEP Parts family, which defines the transformation of
SysML constructs to the EXPRESS elements. Because the XMI standard specifies the XML representation
of SysML metamodel constructs, standardizing the binding of SysML constructs into EXPRESS elements
supports the representation of SysML models as EXPRESS schemas. SysML metamodel concepts that
appear in SysML Block Diagrams are mapped into data specifications defined by EXPRESS schemas.
This document does not map all SysML metamodel constructs to EXPRESS elements, because 10303
SysML models do not use all SysML metamodel constructs.
The EXPRESS schemas are derived from the domain model by applying the implementation bindings
on the SysML XMI. The EXPRESS binding is realized with XSL transformations, which transforms the
SysML model into an EXPRESS Schema. The specified binding is a one-way transformation from SysML
information model represented in XMI into an EXPRESS schema. Due to this limitation 10303-16 does
not define the transformation of arbitrary SysML models to EXPRESS.
Readers of 10303-16 require detailed knowledge of the EXPRESS language, and SysML.
The structure, conventions and concepts of the EXPRESS language are defined in ISO 10303-11:2004.
The main component of this standard is:
— the specification of the transformation from SysML XMI to EXPRESS for each STEP element modelled
in SysML.
TECHNICAL SPECIFICATION ISO/TS 10303-16:2021(E)
Industrial automation systems and integration — Product
data representation and exchange —
Part 16:
Description methods: SysML XMI to EXPRESS
transformation
1 Scope
This document specifies a mapping of SysML (ISO/IEC 19514:2017) constructs t
...
TECHNICAL ISO/TS
SPECIFICATION 10303-16
First edition
2021-07
Industrial automation systems
and integration — Product data
representation and exchange —
Part 16:
Description methods: SysML XMI to
EXPRESS transformation
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.1.1 Terms and definitions for generic concepts . 2
3.1.2 Terms and definitions for SysML constructs . 3
3.2 Abbreviated terms . 5
4 SysML XMI to EXPRESS. 5
4.1 General . 5
4.2 Presentation conventions . 5
4.3 Common mapping conventions . 5
4.3.1 Reference to external files . 5
4.3.2 xmi:id, xmi: uuid, and UUID . 6
4.3.3 Assumed sysml:Blo ck in fragments . 6
4.3.4 Containment and reference relationship . 6
4.3.5 Used stereotypes to represent STEP concepts . 6
4.3.6 Select type not treated as SysML supertype. 7
4.4 Mapping of the primary schema . 7
4.5 Mapping of Entities . 7
4.5.1 General mapping of Entity . 7
4.5.2 Mapping of abstract entity . 7
4.5.3 Mapping of entity with one supertype . 8
4.5.4 Mapping of entity with multiple supertypes . 8
4.6 Mapping of simple type . 9
4.7 Mapping of aggregation type .11
4.8 Mapping of aggregation of aggregation type.12
4.9 Mapping of Select type .13
4.9.1 General mapping of select type .13
4.9.2 Mapping of select type containing value type .14
4.10 Mapping of enumeration type .15
4.11 Mapping of entity attribute .15
4.11.1 Mapping of multiplicity and optionality .16
4.11.2 Attribute typed as an Entity .18
4.11.3 Attribute typed as Select .18
4.11.4 Attribute typed as Enumeration type .19
Annex A (normative) Information object registration .20
Annex B (informative) EXPRESS/Information modelling constructs and the equivalent
SysML modelling constructs .21
Bibliography .33
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 184, Automation systems and integration,
Subcommittee SC 4, Industrial data.
A list of all parts in the ISO 10303 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
Introduction
ISO 10303 is an International Standard for the computer-interpretable representation and exchange
of product data. The objective is to provide a neutral mechanism capable of describing product data
throughout the life cycle of a product and independent from any particular system. The nature of this
description makes it suitable not only for neutral file exchange, but also as a basis for implementing and
sharing product databases and archiving.
10303-16 is a member of the description methods series. This document specifies a mapping of SysML
XMI to the EXPRESS language.
The STEP APs Domain models and the STEP Core Model are information model layer components that
are part of the STEP Extended Architecture. These components are developed using SysML. In the past
STEP information models were developed using the EXPRESS language. For legacy reasons it is therefore
required to provide an EXPRESS schema derived from the SysML domain model. It is mandatory that
the transformation from the SysML model to the EXPRESS schema is defined by a reference standard
and guarantee a repeatable process applicable to future application protocols developments.
The Object Management Group (OMG) has standardized the XML Metadata Interchange specification
(XMI) that integrates the OMG Systems Modeling Language (SysML), the OMG Unified Modeling
Language (UML), the OMG Meta-Object Facility (MOF) and the World Wide Web Consortium (W3C)
Extensible Markup Language (XML) standards. SysML inherits the XMI interchange capability from
UML. XMI is a mechanism for the interchange of metadata between UML-based modeling tools and MOF-
based metadata repositories. OMG has also standardized an XMI compliant interchange format for the
SysML thus specifying a lexical representation of SysML models based on a standardized metamodel
of the SysML. That lexical representation includes, among other things, the ability to interchange data
type information, class information (or entities), groupings of classes providing namespaces for the
classes (or schemas), associations between classes and inheritance between classes (or subtypes).
ISO has standardized the EXPRESS language (ISO 10303-11:2004). It is used to specify information
requirements in ISO 10303.
10303-16 specifies a description method of the STEP Parts family, which defines the transformation of
SysML constructs to the EXPRESS elements. Because the XMI standard specifies the XML representation
of SysML metamodel constructs, standardizing the binding of SysML constructs into EXPRESS elements
supports the representation of SysML models as EXPRESS schemas. SysML metamodel concepts that
appear in SysML Block Diagrams are mapped into data specifications defined by EXPRESS schemas.
This document does not map all SysML metamodel constructs to EXPRESS elements, because 10303
SysML models do not use all SysML metamodel constructs.
The EXPRESS schemas are derived from the domain model by applying the implementation bindings
on the SysML XMI. The EXPRESS binding is realized with XSL transformations, which transforms the
SysML model into an EXPRESS Schema. The specified binding is a one-way transformation from SysML
information model represented in XMI into an EXPRESS schema. Due to this limitation 10303-16 does
not define the transformation of arbitrary SysML models to EXPRESS.
Readers of 10303-16 require detailed knowledge of the EXPRESS language, and SysML.
The structure, conventions and concepts of the EXPRESS language are defined in ISO 10303-11:2004.
The main component of this standard is:
— the specification of the transformation from SysML XMI to EXPRESS for each STEP element modelled
in SysML.
TECHNICAL SPECIFICATION ISO/TS 10303-16:2021(E)
Industrial automation systems and integration — Product
data representation and exchange —
Part 16:
Description methods: SysML XMI to EXPRESS
transformation
1 Scope
This document specifies a mapping of SysML (ISO/IEC 19514:2017) constructs t
...
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