Language - Namespace (Scoping rule for name)

namespace.

Completely related to the notion of scope. See Language - Variable (Scope|Execution Context) - lexical scope

File System

• File System - Directory

Dynamic Language:

• Code Shipping - (Package|Module|Library). php definition: In the broadest definition namespaces are a way of encapsulating items. An example with directory as namespace, the file foo.txt can exist in both directory /home/greg and in /home/other, but two copies of foo.txt cannot co-exist in the same directory.
• Function

Markup Language:

• HTML namespace
• The MathML namespace is: http://www.w3.org/1998/Math/MathML
• The SVG namespace is: http://www.w3.org/2000/svg
• The XLink namespace is: http://www.w3.org/1999/xlink
• XML namespace is: http://www.w3.org/XML/1998/namespace
• The XMLNS namespace is: http://www.w3.org/2000/xmlns/