Property:Sort order

Property type: has type::Number

Location
This can be used on (each of) a set of pages. It allows you to change the sort order of the pages  query results.

Usage
Use this property on each page in a set of pages in order to sort them in some numeric order rather than alphabetically.

This is only currently used the pages in Category:Technology (Scavenging, Stone Age, Bronze Age). A normal sort on their names will sort Bronze Age first, then Scavenging, then Stone Age. Using Property:sort order allows you to sort query results numerically, so you get Scavenging, then Stone Age, then Bronze Age.

Examples
Note: it is good practice to include a description of the values in the wikitext, to help other editors:

First, make sure to set a unique sort value on every page in the set.

If you want to also set the items to sort this way on the category page, do this instead:

The extra 0 in the  line is so that 11 sorts after 2, not before. The space makes the category page use a blank header for all pages, not header 0 for 08, header 1 for 12, and so on.

To sort the results an inline  query, add:

Given a sort value and a category of pages to check, use this to find the page:

When setting properties this way, you will often need to get the page name as a string, without linking markup:

Note
Unfortunately, you will need to edit multiple pages in the set if you want to change the sort order. (It would be nice for editors if we found a way so the order could be edited on one page, but affect all pages of that set.)