The Object Exchange Model
(OEM) is a model for exchanging
semi-structured data between
object-oriented databases
An object database or object-oriented database is a database management system in which information is represented in the form of objects as used in object-oriented programming. Object databases are different from relational databases which are ...
. It serves as the basic
data model
A data model is an abstract model that organizes elements of data and standardizes how they relate to one another and to the properties of real-world entities. For instance, a data model may specify that the data element representing a car be c ...
in numerous projects of the Stanford University Database Group, including Tsimmis, Lore, and C3.
Slight variations of OEM have evolved across different Stanford projects. In Lore, labels are actually on parent-child "links" rather than objects. For example, if an OEM object has multiple parents, different parent objects may use different labels to identify that object. An atomic value encoding a person's name might be included in one complex object using the label "Author" and in another complex object using the label "Editor." In C3, additional attributes are required for each object to annotate the changes to the object that have occurred over time.
OEM representationsTextual OEM interchange format used in Lore
The goals of this interchange format were to have textual encodings of OEM to be easy to read, easy to edit, and easy to generate or parse by a program.
See also
*
XML
Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. ...
*
RDF
References
External links
A Standard Textual Interchange Format for the Object Exchange Model
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Database management systems