Object Exchange Model

The Object Exchange Model [1] (OEM) is a model for exchanging semi-structured data between object-oriented databases. It serves as the basic data model in numerous projects of the Stanford University Database Group, including Tsimmis, Lore, and C3. [2]

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. [2]

OEM representations

Textual 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.

gollark: https://iwd.wiki.kernel.org/addressrandomization
gollark: A slight issue with it is that because of some kernel changes which haven't been made because ???, it has to power on/off the wireless card when you change MAC, which takes *multiple* hundreds of milliseconds.
gollark: I also have iwd configured to deterministically use different MAC addresses per network, and I think iOS/Android do similar stuff.
gollark: I said scan (as in WiFi scanning), not DHCP whatevering.
gollark: I'm pretty sure most software randomizes it on scan nowadays.

See also

References
  1. Papakonstantinou, Y.; Garcia-Molina, H.; Widom, J. (1995). "Object exchange across heterogeneous information sources". Proceedings of the Eleventh International Conference on Data Engineering. Taipei, Taiwan: IEEE Comput. Soc. Press: 251–260. CiteSeerX 10.1.1.47.5182. doi:10.1109/ICDE.1995.380386. ISBN 978-0-8186-6910-1.
  2. "A Standard Textual Interchange Format for the Object Exchange Model (OEM)". infolab.stanford.edu. Retrieved 2020-02-07.
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