The Next Available rule adds an obstacle to collaborating on the road to complete metadata repositories. When next available is yes, a selected metadata element must be played in the next available record.
Example: After two rounds, Red must play an R to start round 3 and Blue must play an A because of selection constraints on the board. Red must play the R in record 3 because it is the only R available in an existing record. The Next Available rule controls where Blue can play in round 3:
If Next Available is Yes (default), Blue must play an A in record 2 and a collaboration bonus will not be scored for record 2 because two fields were filled by Blue.
If Next Available is No, Blue can play the A in record 3, preserving the possibility of a collaboration bonus for record 2 if Red selects an A in a subsequent round.