Slide 6
Slide 6 text
Resource Types and Resources
It is important, and sometimes difficult, to understand the difference between Resource
Types and Resources. The Inventory page (left) shows Resources by Resource Type.
The Resource Type is the definition of all of the Resources that belong to that Type. If
you are familiar with ERP systems, a Resource Type is like a Product Master or Item
Master, and resources are like Inventory Items. Or in books, an ISBN (International
Standard Book Number) is the ID of a Resource Type, and all of the individual books with
that ISBN are Resources. For another example, "Room 101" and “Room 102” might be
Resources belonging to a Resource Type called "Room".
Or at Amazon, you always buy a Resource Type. Amazon knows what Resources they
have in inventory for that Type, but you are not specifying which Resource you want. The
warehouse will determine that when they pick and ship.
Usually Resources would only be instantiated if they are inventoried: and usually, that is if
they exist physically and tangibly somewhere, and you want to know about it in the
system.
Money is particular: a Resource Type that might be instantiated in a pile of cash, but
more often as the balance of a bank account or a number in a database.
Some Resource Types may never be instantiated: for example Types of Work.
Resource types
Resources
Resources