<b>Description:</b>Represents the HL7 V3 publishing sub-section that holds specifications related to the definition and communication of reasoning (knowledge) within the Health and Clinical Management (HM) section.<i>UsageNote:</i>V3 Specifications are published in a set of "domains", which contain interactions and related specifications for a single area of health care within which can be supported by a single, coherent set of interoperability specifications.<p>For publishing purposes, these domains are aggregated into sub-sections of related health care areas and these sub-sections are further aggregated into three major sets.</p>