parallel "{"
...
( "}" and "{"
... )+
"}"
The parallel construct defines a set of paths that represent behaviour that should occur concurrently.
The syntax for the parallel construct is:
parallel "{"
...
( "}" and "{"
... )+
"}"
For example,
parallel {
CheckStock from Seller to Wholesaler;
StockAvailability from Wholesaler to Seller;
} and {
CreditCheck from Seller to CreditAgency;
CreditReport from CreditAgency to Seller;
}