[Zope-CMF] portal metadata tool policy enforcement

[kapil thangavelu]

hi folks,

i'm embarking on my first cmf based project, and i had a question about the 
portal_metadata tool.

it seems that the portal metadata tool can setup default content metadata 
values,  and handle enforcement of those values. but it doesn't appear to be 
wired into content creation or editing. am i missing something?

as is, i'm calling the tool in specific content factory methods to set 
initial values, and within the relevant content edit methods.

in terms of generically hooking up the portal_metadata tool, since content 
creation is already generic, does it make sense to add a call to the 
portal_metadata tool directly to CMFCore.utils.manage_addContent and to the 
types tool.constructInstance method? are there other generic mechanisms for 
content creation within the cmf?

that would still leave the editing unaccounted for. the only place i can 
think to generically add a hook for calling the tool might be the index 
method of CMFCatalogAware, but that would require some special consideration 
of creation vs. editing within the index method. any ideas?

thanks

kapil