Industrial automation systems and integration — Product data representation and exchange — Description methods: The EXPRESS-Q language reference manual Industrial automation systems and integration Product data representation and exchange Description methods: The EXPRESS-Q language reference manual Systèmes d’automatisation industrielle et intégration — Représentation et échange de données de produits — Méthodes de description: Manuel de référence du langage EXPRESS-Q Systèmes d’automatisation industrielle et intégration Représentation et échange de données de produits Méthodes de description: Manuel de référence du langage EXPRESS-Q ISO/PWI 10303-81ISO/PWI 10303-81:2024(E)urn:iso:std:iso:10303:-81:stage-00.00:enISO/PWI 10303-81ISO/PWI 10303-81(en)10303 International Organization for Standardization ISOTechnical committee International Organization for Standardization Industrial automation systems and integration TC 184Subcommittee International Organization for Standardization Industrial data SC 4Workgroup International Organization for Standardization STEP product modelling and resources WG 12Agency International Organization for Standardization ISO International Organization for Standardization ISOTechnical committee International Organization for Standardization Industrial automation systems and integration TC 184Subcommittee International Organization for Standardization Industrial data SC 4Workgroup International Organization for Standardization STEP product modelling and resources WG 1212024-10-10en00002024 International Organization for Standardization ISOinternational-standardISOIndustrial automation systems and integrationIndustrial dataSTEP product modelling and resourcesANSIISOIndustrial automation systems and integrationIndustrial dataSTEP product modelling and resourcesISO 10303Preliminary Work Item International Standard