**This proposal is withdrawn; see [[Talk.MultilinePlaceholderProposal]] for reasons. **

This proposal is based on the discussion on [[Talk.Creole 0.4]]. See also
[[GenericExtensionElementProposal]], which conflicts with this proposal.


There is a need to support arbitrary data in Creole text, for at least two purposes:
* Modules (plugins) which allow a user to insert the result of the plugin into the page's contents.
* [[http://en.wikipedia.org/wiki/Literate_programming|Literate programming]]

Fixed syntax for parameters should be avoided in Creole specification, because it is difficult to anticipate the requirements for data type, character set with escape sequences, etc. Even a consensus on module names seems difficult to reach.

==New construct==

The following construct, which may appear as a block (at the beginning of a line) or inline, is reserved
for modules. It is guaranteed that it will not conflict with future Creole mark-up. The syntax of what
follows, the end marker and the semantics depend on the Creole engine.

<<< etc.