PubLevel (MQLONG)

The initial value of this field is 9. The level of subscription targeted by this publication. Only those subscriptions with the highest SubLevel less than or equal to this value receive this publication. This value must be in the range zero to 9; zero is the lowest level. However, if a publication has been retained, it is no longer available to subscribers at higher levels because it is republished at PubLevel 1.

For information, see Intercepting publications.