:tangleThe :tangle header argument specifies whether or
not the code block should be included in tangled extraction of
source code files.
tangle The code block is exported to a source
code file named after the basename (name w/o extension) of the
Org-mode file. E.g., :tangle yes.no The default. The code block is not exported
to a source code file. E.g., :tangle no.:tangle
header argument is interpreted as a file basename to which the
block will be exported. E.g., :tangle
basename.