{{{ #!comment NB! Make sure that you follow the guidelines: http://trac.posccaesar.org/wiki/IdsAdiEditing }}} [[TracNav(TracNav/PcaSig)]] = Modelling, Methods, and Technology SIG = This is the PCA-MMT-SIG homepage. The focus of this SIG is the application of formal approaches to using ISO 15926. Note: For implementations, please refer to the [wiki:IdsAdiProject IDS-ADI-ISO15926-Pages]. [[PageOutline(2-4,Contents,inline)]] == Ongoing activities == * The current focus is on defining predicates with complex definitions, as applied in ISO 15926 ''templates''. The approach is due to be standardized in Part 7 of ISO 15926. See below for information on the various ''parts'' of ISO 15926 and how [wiki:IdsAdiProject IDS-ADI] is involved. * SIG MMT will strive to align work on ISO 15926 with current developments in the research field of applied logic. The representation of [http://trac.posccaesar.org/wiki/ISO15926inOWL ISO 15926 in OWL], developed in the [wiki:IdsAdiProject IDS] project, is of particular practical relevance. == Templates == ISO 15926 ''templates'' are patterns for facts for which definitions are stated using rules. (Formally, a template is a first-order logic predicate.) This provides for a precise and implementation-independent interface to ISO 15926, and is intended to be applied in creating and maintaining ontologies that conform to the standard. Templates are the subject of the in-progress ISO 15926 ''Part 7''. They standardize valid usage patterns of ''Part 2'', and how ''Part 4'' and other ''reference data'' is represented. See TemplateGenerics for an introduction. As standard usage patterns, Templates come in different levels of granularity, different levels of abstraction and specialization, represented in and mapped between different levels of expression, from business levels to explicit Part 2 patterns. === Template Development and ISO 15926 languages === Templates may be used to define and represent both reference data and project data. The following figure illustrates the relations between the languages of ISO 15926 Parts 2/4 and the template language of Part 7. In brief: Part 2 corresponds to a Description Logic (DL) TBox, i.e., classes and relations. Part 4 and other reference data populate the Part 2 structure with individual instances, a DL ABox. Templates according to Part 7 require a much more expressive, first-order language. {{{ #!LatexEquation \xygraph{!{0;(2.0,0):(0,0)} {\emph{Data (DL)}} ( [rrr] {\emph{Templates (FOL)}}) ( [d(.5)] *++[F=]\txt{Data Model\\(Part 2 TBox)} ( :@{->}_*\txt{Predicates of} [rrr] *++[F-:<3pt>]{\txt{Base templates}}="basetemp" ) :|{\txt{Add instances}} [d] *++[F=]\txt{Reference Data\\(Part 4 ABox)}="part4" ( :@<-1ex>_*\txt{Use in constraints} [rrr] *++[F-:<3pt>]{\txt{Core templates}}="coretemp" :@<-1ex>_{\txt{Use to build}} "part4" "basetemp" :|*+\txt{Use to build} "part4" "basetemp" :|{\txt{Add constraints}} "coretemp" ) :|{\txt{Add instances}}[d] *++[F=]\txt{Project Data\\(Part 4 ABox)}="projectdata" ( :@<-1ex>_*\txt{Use in constraints} [rrr] *++[F-:<3pt>]{\txt{Project templates}}="projecttemp" :@<-1ex>_{\txt{Use to build}} "projectdata" "coretemp" :|*+\txt{Use to build} "projectdata" "coretemp" :|{\txt{Add constraints}} "projecttemp" ) ) } }}} * TemplateGenerics gives an informal account of what goes into the definition of a template. Look at the bottom of this page, and of [wiki:TemplateDescriptionID], for ongoing discussion on the characterization of ISO 15926 templates. A document describing the current list of templates defined in the [wiki:IdsAdiIdsPrototype IDS] project, with roles and brief definitions in natural language, can be found as an attachment to the [wiki:IdsAdiIdsPrototype Intelligent Data Sets Prototype] page. === Templates documented on Wiki pages === Every template defined in ISO 15926 Part 7 will be documented on a separate page in this Wiki, according to a common pattern. For a list of template pages, go to TemplateIndex. == Tools in this Trac == SIG MMT has provided certain Trac features that support the needs of modellers. ''ISO 15926 Diagrams''. The Wiki provides for entering diagrams of ISO 15926 models, using a simplified set of [http://www.tug.org/applications/Xy-pic/ xy-pic] commands; see [wiki:ISO15926Diagrams]. Examples can be found in [wiki:ISO15926Diagrams_BoltSet], [wiki:ISO15926Diagrams_Weights]. ''Symbolic notation using LaTeX''. This Trac supports entering content in LaTeX format, using the [http://openvest.com/trac/wiki/LatexEquation LatexEquation] plugin. This is useful for entering first-order formulae, and [wiki:ISO15926Diagrams diagrams]. ''Macros for fetching reference data''. A facility for dynamically pulling content from the Reference Data Library for graphical display on Trac pages, using [http://trac-hacks.org/wiki/XsltMacro XSLT], [http://trac-hacks.org/wiki/GraphvizPlugin graphviz], and the [http://trac-hacks.org/wiki/MacroChainMacro macrochain] macro, is high on our wishlist. For the time being, only the XSLT macro works with Trac 0.11. == Source material == === Presentations === Presentations from [http://www.posccaesar.com/en-GB/PortalObject/2803/POSCCaesar.aspx Semantic Days 2008] are available in Powerpoint format. We intend to provide PDF formatted copies shortly. * A Tutorial on semantic technology, with special focus on templates for ISO 15926. [source:SIG/MMT/work/presentations/IDS-tutorial-Semantic-Days-2008.ppt Download slides] * A presentation of SIG MMT, describing this Trac and the need for template interfaces for creating reference data. [source:SIG/MMT/work/presentations/MMT-SIG-support.ppt Download slides] == Links == * [http://rds.posccaesar.com/2008/02/OWL/ISO-15926-2_2003 The 15926-2 standard in OWL] (non-authoritative). If you wish to work with this to create data, consider [http://protege.stanford.edu/download/download.html Protege] 3.4 beta (note: build 126 or later) or 4.0 alpha. To open the ontology in the [http://pellet.owldl.com/ontology-browser/ OwlSight] ontology browser, [http://pellet.owldl.com/owlsight/?ontology=http://rds.posccaesar.org/2008/02/OWL/ISO-15926-2_2003 click here]. * [http://www.steptools.com/sc4/archive/oil-and-gas/15926-0002-lifecycle_integration.exp?rev=1.1&content-type=text/vnd.viewcvs-markup The 15926-2 standard in EXPRESS] (authoritative), with [http://www.tc184-sc4.org/wg3ndocs/wg3n1328/.%5Clifecycle_integration_schema.html documentation in HTML] * Under development, an [http://trac.posccaesar.com/svn/SIG/MMT/work/models/ISO_15926_RDL.htm overview of ISO 15926 reference data resources] contains a series of resources (files and links) related to Models, Methods and Technology for ISO 15926. ''Please note that access to these resources currently requires logging in, that display requires Internet Explorer, and that some of the links are limited to internal DNV use for the time being''. * Take note: A new paper called [http://www2008.org/papers/pdf/p555-motikA.pdf Structured Objects in OWL] (Motik, Cuenca Grau, Sattler) is extremely promising with regard to finding a more natural and powerful language for defining templates. Stay tuned. Contact: Johan W. Klüwer, johan.wilhelm.kluewer@dnv.com. ---- [[ViewTopic(What Is A Template)]]