{addOnly}:It specifies that any new connection can be added from an object located at the other end in an association. {frozen}:The frozen constraint specifies that whenever a link is added between objects, it cannot be altered by the time it is activated over the connection or given link...
PTA stands for the Parent Teacher Association. PTA is a formal association of parents and educators created to support and reform the educational system and get parents interested in their child's academics. The primary goal of any PTA is to promote the well-being of the children. ...