Identifying entities based on interactivity models

1. A computing system for tracking interactivity between entities, the computing system comprising:

one or more computer-readable storage media that is not a propagated signal storing computer-executable instructions for

accessing interactivity models, each interactivity model modeling interactions between a target entity and a participant entity, the interactivity models of the target entity being stored separately from the interactivity models of other target entities in a distributed matter;

receiving indications of interactions between the target entity and participant entities;

upon receiving an indication of an interaction between the target entity and a participant entity, updating in real time the interactivity model for the target entity and that participant entity;

responding to a query by:

receiving the query that specifies an interactivity criterion that specifies a characteristic of an interactivity model;

analyzing interactivity models to determine whether the interactivity criterion is satisfied by one or more participant entities, wherein a participant entity satisfies the interactivity criterion when the interactivity model of the participant entity exhibits the characteristic; and

sending a response to the query indicating whether the interactivity criterion is satisfied by one or more participant entities, and (Original) when the interactivity criterion is satisfied, identifying a participant entity that satisfies the interactivity criterion; and

determining whether another target entity has participant entities that satisfy an interactivity criterion by:

sending a query for the other target entity, the sent query specifying an interactivity criterion that specifies a characteristic of an interactivity model; and

receiving a response to the sent query for the other target entity, the received response indicating whether the interactivity criterion is satisfied by one or more participant entities of the other target entity, and when the interactivity criterion is satisfied, identifying a participant entity that satisfies the interactivity criterion; and

a processor that executes the computer-executable instructions stored in one or more computer-readable storage media.

2. The computing system of claim 1 wherein the interactivity models for the target entity are stored at a computing device of the target entity.

3. The computing system of claim 1 wherein the interactivity model for a target entity and a participant entity includes totals of interactions between the target entity and that participant entity covering multiple time frames.

4. The computing system of claim 3 wherein the total for the most recent time frame is updated in real time as indications of interactions are received.

5. The computing system of claim 1 wherein the sent query specifies a target profile of another target entity.

6. The computing system of claim 1 wherein each interaction has an interaction type that is selected from a group consisting of a scheduled meeting, a voice mail, a phone call, and a document collaboration.

7. A method performed by a computing system for tracking interactivity between entities, the method comprising:

accessing interactivity models, each interactivity model modeling interactions between a target entity and a participant entity, the interactivity models of the target entity being stored separately from the interactivity models of other target entities in a distributed matter;

receiving indications of interactions between the target entity and participant entities;

upon receiving an indication of an interaction between the target entity and a participant entity, updating in real time the interactivity model for the target entity and that participant entity;

responding to a query by:

receiving the query that specifies an interactivity criterion that specifies a characteristic of an interactivity model;

analyzing interactivity models to determine whether the interactivity criterion is satisfied by one or more participant entities, wherein a participant entity satisfies the interactivity criterion when the interactivity model of the participant entity exhibits the characteristic; and

sending a response to the query indicating whether the interactivity criterion is satisfied by one or more participant entities, and when the interactivity criterion is satisfied, identifying a participant entity that satisfies the interactivity criterion; and

determining whether another target entity has participant entities that satisfy an interactivity criterion by:

sending a query for the other target entity, the sent query specifying an interactivity criterion that specifies a characteristic of an interactivity model; and

receiving a response to the sent query for the other target entity, the received response indicating whether the interactivity criterion is satisfied by one or more participant entities of the other target entity, and when the interactivity criterion is satisfied, identifying a participant entity that satisfies the interactivity criterion.

8. The method of claim 7 wherein the interactivity models for the target entity are stored at a computing device of the target entity.

9. The method of claim 7 wherein the interactivity model for a target entity and a participant entity includes totals of interactions between the target entity and that participant entity covering multiple time frames.

10. The method of claim 9 wherein the total for the most recent time frame is updated in real time as indications of interactions are received.

11. The method of claim 7 wherein the sent query specifies a target profile of another target entity.

12. The method of claim 7 wherein each interaction has an interaction type that is selected from a group consisting of a scheduled meeting, a voice mail, a phone call, and a document collaboration.