Please see the following link to Apache mod_rewrite where you can define you re-write rules:Redirecting and Remapping with mod_rewrite - Apache HTTP Server Version 2.4
To my knowledge the "index" property indicates if this property should be indexed which can be used for fulltext index in which some properties may need to be excluded from getting indexed.
The 1st step to help you is to have a clear problem description and environment spec info. 1. What kind of task are you performing when getting this error ? Whats the use case ?2. What version of the product you are using ?
By "authoring tag" are you referring to tagging multiple pages with an existing tag under the same node OR creating a new tag and applying to multiple pages under the same node ?