Core schema

Use the following information to understand the NCIM database core schema.

The following UML diagram shows how NCIM models containment relationships.

In this diagram, the entity class has no connections to any of the other classes. This is intentional because the entity view is no longer part of the NCIM model as it got split into the entityData and domainMembers classes, and their corresponding tables. However, the entity class has been maintained as a database view partly for convenience as it makes some SQL easier to write but mainly to ensure backwards compatibility with previous versions of the schema. The entity class is shown in the diagram for completeness.

UML diagram showing how NCIM models containment relationships — Figure 1. Core schema

Table 1 describes the NCIM relationship database table and data dictionary that correspond to each class and relationship in the core schema.

Table 1. Classes and relationships for the core schema
NCIM table	Class or relationship	Related NCIM table or view	Data dictionary
Collection	Abstract Class	Not applicable	Not applicable
collects	Relationship	collects	collects
connects	Relationship	connects	connects
contains	Relationship	contains	contains
dependsOn	Relationship	entityDetails	dependency
domainMembers	Class	domainMembers	domainMembers
domainMgr	Class	domainMgr	domainMgr
Element	Abstract Class	NA	`NA`
entity	Class	entity	entity
entityClass	Class	entityClass	entityClass
entityData	Class	entityData	entityData
entityDetails	Class	entityDetails	entityDetails
entityNameCache	Class	entityNameCache	entityNameCache
entityType	Class	entityType	entityType
hostedService	Relationship	hostedService	hostedService
implementsEndPoint	Relationship	hostedService	protocolEndPoint
manager	Class	manager	manager
networkPipe	Class	networkPipe	networkPipe
pipeComposition	Class	pipeComposition	pipeComposition
protocolEndPoint	Class	hostedService	protocolEndPoint
topologyLinks	Relationship	hostedService	topologyLinks