Grouping Content

[pdl]

There should be a facility for grouping content suitable for the following use cases:

• Ordered alphabetically by slug (e.g. for a collection of articles where no particular order is required, or for a glossary)
• Ordered manually (e.g. for a reading list or tutorial where the order has pedagogical value)
• Ordered by date (e.g. for a blog or similar)

It should be possible for a user to add items to any of these groups, and, in the case of the manually-ordered option, to sort them.

Sort order should be performed by dispatch to a sortation class.