B2MML is an XML implementation of the ANSI/ISA-95, Enterprise-Control System Integration, family of standards (ISA-95), known internationally as IEC/ISO 62264. B2MML consists of a set of XML schemas written using the World Wide Web Consortium's XML Schema language (XSD) that implement the data models in the ISA-95 standard.
https://github.com/MESAInternational/B2MML-BatchML/blob/00c1b8b59509fda3fee73712164af2d8dcc4d7a9/Schema/B2MML-WorkSchedule.xsd#L132
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