In the past, request IDs were a string of up to 5 indices:
<dataset>.<snippet>.<resolution>.<sequence>.<iteration>
As of 30/12/05, this is now a string of 6 indices. The order of the incides has been reversed (for internal consistency with dependency bitmasks), and a new index has been prepended, the request type. The new layout is:
<request type>.<iteration>.<sequence>.<resolution>.<snippet>.<dataset>
The request type is a short string indicating the kind of request. The following types are presently in use:
ev: evaluate w/o derivatives
e1: evaluate with single derivatives
e1: evaluate with double derivatives
ds: discover spids (first request sent up by a Solver)
pu: parm update (last request sent up by a solver)