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Mathematica > Core Language > Package Development > Namespace Management >

Built-in Mathematica Symbol

$ContextPath

$ContextPath
is a global variable that gives a list of contexts, after $Context, to search in trying to find a symbol that has been entered.

The elements of $ContextPath are tested in order to try to find a context containing a particular symbol.

$ContextPath is a rough analog for Mathematica symbols of the "search path" for files in many operating systems.

The default contexts for looking up symbols:

If a symbol with a given name cannot be found in one of these contexts a new one is created:

It is created in the context given by $Context:

Turn off the message for new symbol creation:

The default contexts for looking up symbols:

If a symbol with a given name cannot be found in one of these contexts a new one is created:

It is created in the context given by $Context:

Turn off the message for new symbol creation:

Add Developer` context to the context path:

PackedArrayForm is a command in the Developer` context that can now be used directly: