||A Community is defined by an AGENT, in terms of the common characteristics of the PERSONs and/or ORGANIZATIONs that are contained in it.
The STATE of a COMMUNITY can be tracked without having to know the identity of each PERSON and ORGANIZATION.
A COMMUNITY might be composed of other COMMUNITYs. For example
* the Business sector might be composed of the Industrial sector, the Tourism sector, the Financial Services sector etc.
* the youth of a town are contained in the residents of a town.
The actual PERSONs or ORGANIZATIONs might change without changing the identity of a COMMUNITY, for example the 'Long Term Unemployed in a City' remains the same COMMUNITY even though some people have left it, and others have joined it.
Members of a COMMUNITY do not need to be aware of each other, and are not acting with a collective goal. If they are, then they are an ORGANISATION. For example, 'Long Term Unemployed', is a COMMUNITY, whereas 'The Job Seekers Club', is an ORGANIZATION.