what does IPD refer to? ie how to fix table error re IPD

I am getting an error using FOP 0.20.3 [ERROR]: At least one of minimum, optimum, or maximum IPD must be specified on table. What does IPD refer to? That is, how best to fix this? R.Parr Temporal Arts - To unsubscribe,

Re: what does IPD refer to? ie how to fix table error re IPD

Randall J. Parr wrote: [ERROR]: At least one of minimum, optimum, or maximum IPD must be specified on table. What does IPD refer to? It means inline progression dimension, or width for the average western european (height for guys who write in columns instead of lines). That is, how best