EPISTLE Core Model

Overview

The EPISTLE Core Model (ECM) is an integrated data model that covers the information requirements of the full process plant life cycle and enables integration of process plant information with other enterprise information. The ECM is standardized as ISO 15926-2, and is also the basis for ISO 10303-221.

The EPISTLE Core Model is designed to be used in conjunction with reference data: standard instances that represent information common to a number of users, process plants, or both. The support for a specific life-cycle activity depends on the use of appropriate reference data in conjunction with the data model.

The EPISTLE Core Model is intended as the basis for implementation in a shared database or data warehouse. EPISTLE templates specify how the ECM can be used to support exchange between applications and repositories.

EPISTLE Core Model Version 4.0

The EPISTLE Core Model Version 4.0 is a major revision to the previous release of the EPISTLE Core Model (version 3.1). Version 4.0 was approved for publication by the EPISTLE Management Committee at its meeting in February 2001.

The entire Version 4.0 documentation can be browsed online. Click here to browse the HTML documentation.

The EPISTLE Core Model Version 4.0 documentation can be downloaded in three forms:

• HTML browser files containing a complete set of EXPRESS G diagrams for the model, together with textual descriptions and examples for each model entity datatype
  ecm_400_html.zip (897 Kbytes zipped)
• Microsoft Word document containing a complete set of EXPRESS G diagrams for the model, together with textual descriptions and examples for each model entity type
  ecm_400_doc.zip (151 bytes zipped)
• EXPRESS language text file
  ecm_400_exp.zip (19 Kbytes zipped)

The EPISTLE Core Model Version 4.0 model is the result of resolution of comments raised against the EPISTLE Core Model Version 3.1 (ISO/CD 15926-2) undertaken by the joint EPISTLE data modelling team.

The issues log for ISO/CD 15926-2, which details the differences between version 3.0 and 4.0 of the EPISTLE Core Model (and between ISO/CD 15926-2 and ISO/DIS 15926-2) is on SOLIS (the SC4 Online Information Service) as document ISO TC184/SC4/WG3 N1041.

The EPISTLE Core Model Version 4.0 model forms the basis for ISO/DIS 15926-2, which has been submitted for Draft International Standard ballot in August 2001.

Comments and issues

Comments and issues against the EPISTLE Core Model Version 4.0 can be submitted in two ways.

• Feedback, including issues and comments, about the V4 model, should be sent by e mail to feedback@posccaesar.com. Each issue will be logged and input to the EPISTLE process for managing the development of future releases of the model. Issues collected in this way will be submitted to ISO by EPISTLE as comments against ISO/DIS 15926-2. When submitting issues please include as much of the following as you can, and submit separate emails for separate issues:
• Name and company
• Part and version of Specification (Data model, or reference data)
• Name of Issue, description of issue, and examples
• Impact on Use
• Proposed Solution
• Formal issues against the Draft International Standard (ISO/DIS 15926-2) must be submitted through national standards bodies to the ISO Central Secretariat in Geneva. Please contact your national standards body to participate in formal reviews of the ISO document.

Last update 2001-08-31