KeyCase: Sets the case in which keys are stored

KeyError: Report an error if the requested key does not exist?

SizeGuess: The expected size of the KeyMap.

SortBy: Determines how keys are sorted in a KeyMap.

MapLocked: Prevent new entries being added to the KeyMap?

AST_MAPCOPY: Copy all entries from one KeyMap into another

AST_MAPCOPYENTRY: Copy a single entry from one KeyMap into another

AST_MAPDEFINED: Does a KeyMap contain a defined value for a key?

AST_MAPGET0$<$X$>$: Get a named scalar entry from a KeyMap

AST_MAPGET1$<$X$>$: Get a named vector entry from a KeyMap

AST_MAPGETC: Get a scalar or vector entry as a single string.

AST_MAPGETELEM$<$X$>$: Get an element of a named vector entry from a KeyMap

AST_MAPHASKEY: Does the KeyMap contain a named entry?

AST_MAPKEY: Return the key name at a given index in the KeyMap

AST_MAPLENC: Get the length of a named character entry in a KeyMap

AST_MAPLENGTH: Get the length of a named entry in a KeyMap

AST_MAPPUT0$<$X$>$: Add a new scalar entry to a KeyMap

AST_MAPPUT1$<$X$>$: Add a new vector entry to a KeyMap

AST_MAPPUTELEM$<$X$>$: Puts a value into a vector entry in a KeyMap

AST_MAPPUTU: Add a new entry to a KeyMap with an undefined value

AST_MAPREMOVE: Removed a named entry from a KeyMap

AST_MAPRENAME: Rename an existing entry in a KeyMap

AST_MAPSIZE: Get the number of entries in a KeyMap

AST_MAPTYPE: Return the data type of a named entry in a map