Extension:ProtectSection

Rationale and Features
Sometimes wikis want to allow editing on only part of a page. ProtectSection implements tags to block editing by users who are not sysops or bureaucrats. Attempts to edit text between protect tags, or to delete protect tags will result in an error message being displayed when the user tries to save the page.

Status
There are actually two versions. ProtectSection.php can be found on svn or a version modified by Jim Hu can be used:

Installation
The usual: Copy to extensions folder. Add require_once( "$IP/extensions/ProtectSection.php"); to LocalSettings.php

Alternatives
Extension:PageSecurity for page level granularity.