MOVE from versioned source:

Note that sending a MOVE request with a Target-Selector header is ILLEGAL; it is impossible to delete or move away a single version. Use COPY instead to specify a source version. Thus these two tables assume no Target-Selector header.

Destination state	Overwrite: T	Overwrite: F	Overwrite: update
Exists, versioned	Replace dest version-history with src version-history.	Fail.	Entire src version-history is added onto the dest history.
Exists, NOT versioned	Replace dest with default version from source	Fail	Same as T
Doesn’t exist	Create a versioned resource at the dest w/ all the history from src.	Same as T	Same as T
Doesn’t exist, can’t be versioned	Create new resource at the dest with default version from source	Same as T	Fail

MOVE from unversioned source:

(since the target may be versioned, and since versioning defines Overwrite: update, the versioning spec must address this scenario)

Destination state:	Overwrite: T	Overwrite: F	Overwrite: update
Exists, versioned	Replaces all dest versions with single version from source	Fail	Create a new version at dest with contents of src.
Exists, NOT versioned	Defined by WebDAV to replace dest.	Fail	Same as T
Doesn’t exist	Defined by WebDAV to create dest	Same as T	Same as T

Abbreviations used:

- dest à destination

- src à source

- w/ à with

COPY from versioned source: 

If the source is versioned, COPY can legitimately have a target-selector header. If it doesn’t, does the user intend to COPY the entire history, or the default version? This table specifies…

Destination State	Overwrite: T	Overwrite: F	Overwrite: update
Exists, versioned	Replace entire version-history at dest w/ selected version from src	Fail	Create new version at dest w/ selected version from src
Exists, not versioned	Replace dest w/ selected version from src	Fail	Fail
Doesn’t exist	Create unversioned dest w/selected content from src	Same as T	Create new versioned resource, or fail?
Doesn’t exist, and can’t be versioned	Create unversioned dest w/ selected content from src	Same as T	Fail

COPY Behaviour, non-versioned source

In this case, Target-Selector header is illegal…

Destination State	Overwrite: T	Overwrite: F	Overwrite: update
Exists, versioned	Illegal to replace an existing version history with nothing?	Fail?	Create new version at dest w/ content from src.
Exists, not versioned	Defined by WebDAV to overwrite content	Fail	Illegal?
Doesn’t exist	Defined by WebDAV to create dest	Succeed	Meaningless – perhaps should do same as T