Besides the fixing vectors, another new entity can be created by the same command, namely, a connector. A connector is a construction entity that provides a slick referencing system for 2D fragments. It keeps the complete set of placement references for the fragment, including the coordinate system placement and orientation, and additional data. These data are stored as a list of values that can be either fixed constants or modifiable parameters. As for the parameters, their names are significant in the following way. Assigning same names to the external parameters of the fragment to be connected makes these parameters assume the values of their counterparts in the connector.
A connector activates automatically when the mouse is dragged over it or its referenced entities. When a fragment with connectors is assembled, these connectors automatically become available for referencing other fragments