Re: [ontolog-forum] Foundation ontology, CYC, and Mapping

[Duane Nickull <dnickull@xxxxxxxxx>]

Doug:

Can you please clarify what you mean by “Sets are timeless; they cannot change their members”. Do you mean they cannot add new members?  Can they not change enumeration lists of existing members?  Can existing members values be retracted?

D


On 2/3/10 5:47 PM, "doug  foxvog" <doug@xxxxxxxxxx> wrote:

> The definition should start out that a set has members.  Restrictions
> on the permissible types of members can identify different types of set,
> or in given contexts may limit what is considered to be a generic set.
> Sets are timeless; they cannot change members.  If an element which is not
> in a set is added to a set, the result is a different set.

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