is yet another byte encoded language for describing data definition statements. The DSQL subsystem in IB passes parsed DDL statements to a component that emits DYN and then to the Y-Valve that interprets DYN and modify directly system tables that are "active" by design.

Dynamic Height. This is a measure of the elevation of the sea level , calculated by integrating the specific volume anomaly of the sea water between the sea surface and 500 m depth.