You can test whether a LOB locator is initialized, open or temporary with
The predicate for internal LOBs is
returns a Lisp element type corresponding to the LOB locator as described Determining the type of a LOB.
return foreign pointers to the various handles in the LOB mentioned in Interactions with foreign calls. To determine the best value for the size of a buffer use
query the charset of a
The querying functions specifically for file LOBs are
You can obtain the current length of the LOB with
You can test two LOB locators for whether they point to the same LOB object with