I have two hypothetical ideas, but whether either of them would work is dependant upon the data type of the IDs and the structure of the data.

* If the IDs are integer values, perhaps you can convert the values to hexadecimal or some other numeric equivalent that requires fewer characters to convey the same value.

* If there are dependencies between the IDs (for example, if "A" has a certain value, then "B" will always have a fixed value or be within a limited range of values), then perhaps it would be possible to create surrogate keys that reduce the total number of permutations and thus fewer parameters to pass.

Neither of these is a simple solution, and possibly neither is practical. Whatever solution you find, it will likely require some creative thinking and outside-the-box ingenuity. So if (when) you find a solution and successfully implement it, please post your answer here so that others can benefit too from what you discover.

Geoff