3.2.5 Specifying Relationships in RESQML

RESQML uses the standard XML hierarchical relationship, for example, where one data object is contained inside another. However, the nature of subsurface description means there are many possible hierarchies in a reservoir model with more complex relationships between RESQML data objects, which cannot be modeled in a single hierarchical fashion. For example:

• Relationships between feature, interpretations, and representation that create the knowledge hierarchy defined in Section 3.2.3 "Knowledge Hierarchy": Features, Interpretations, Representations , and Properties .
• Relationship between data objects of the "same level" of the knowledge hierarchy, such as two horizon features that intersect to form a contact feature, and which may be combined to make-up part of a structural framework.

To address these more complex relationships, RESQML uses a data object reference, which is explained in Section 5.4 Specifying Relationships in RESQML .

Additionally, relationships are specified in the context of an Energistics Package, which is explained in Section 3.2.6 EPC File for Grouping Data Files .