A property model is a model that states properties of a system, a component or a single object without prescribing a particular construction. Property models are not constructive, but used to characterise an entity from the outside. There are many kinds of properties: behaviour properties, performance properties, maintenance properties, etc. This is the perspective preferred by users and sales persons. It is also the main perspective in specifications.
In TIMe properties will be expressed mainly using text and MSCs.