[TYPO3-ect] Sorting-DB-Field in Extension

[Benjamin Mack]

Hey all,

I am currently in need of a "sorting" field for tt_news. So I want to 
create an extension that adds this missing feature and add a "sorting" 
field to the table in the DB.

So here's my question: I can't seem to find any information about the 
special use of the sorting field (how I should use it when doing INSERTs 
, UPDATEs, how to "move" an item up / down etc.) in the documentation - 
am I looking in the wrong place?

Or better: is this feature already in tt_news (to manually sort items 
for output)?

thanks a bunch,
greetings,
benni.
-SDG-