Primary Parent Category, Category Rollup

Hello,
Could someone tell the difference between "Primary Parent Category" and "Category Rollup" and when one would choose to use one over the other.
Thanks

[BJ Freeman]

basically "Primary Parent Category" is the top of the list
"Category Rollup" is the list with which category is parent to it.

buzlite sent the following on 8/22/2009 8:34 PM:
> Hello,
> Could someone tell the difference between "Primary Parent Category" and
> "Category Rollup" and when one would choose to use one over the other.
> Thanks

--
BJ Freeman
http://www.businessesnetwork.com/automation
http://bjfreeman.elance.com
http://www.linkedin.com/profile?viewProfile=&key=1237480&locale=en_US&trk=tab_pro
Systems Integrator.

I'm still confused.  Given your statement that "Primary Parent Category" is at the top of the list.

Let CategoryB.PrimaryParentCategory=CategoryA. Yet, ofbiz allows me to, via rollup, configure CategoryA to have multiple parent categories as well as multiple child categories.

I think my understanding is missing something?

BJ Freeman wrote

basically "Primary Parent Category" is the top of the list
"Category Rollup" is the list with which category is parent to it.

buzlite sent the following on 8/22/2009 8:34 PM:
> Hello,
> Could someone tell the difference between "Primary Parent Category" and
> "Category Rollup" and when one would choose to use one over the other.
> Thanks

--
BJ Freeman
http://www.businessesnetwork.com/automation
http://bjfreeman.elance.com
http://www.linkedin.com/profile?viewProfile=&key=1237480&locale=en_US&trk=tab_pro
Systems Integrator.