We defined our own namespacing mechanism for things like preferences and headers by prefixing with odata. Specifically:

OData Headers:
OData-Version
OData-MaxVersion
OData-Isolation
OData-EntityId
OData-SchemaVersion

OData Preferences:
odata.allow-entityreferences
odata.callback
odata.continue-on-error
odata.include-annotations
odata.maxpagesize
odata.track-changes
odata.omit-values

OData format parameters:
odata.metadata
odata.streaming

In the interest of making some of these conventions and behaviors more broadly adopted, should we consider supporting some of them without the "odata" prefix?