A protocol initiated by Dave Winer.
A simpler version of SOAP.
Facing a new competitor called ReST
Some people are looking at XmlRpc for wikis:
Need to integrate with a business partners, have settled on XML over HTTP. So going to go with XmlRpc for now, largely because it will probably offer more specific examples I can copy from to avoid newbie errors!
Example of returning a "table" of results
I think of an 'array' as a single-column list of values. A 'struct' as a flat table (each 'member' being a row); actually, more like single record, which each 'member' being a name-value pair (field-name and its value). So if I'm passing multiple flat records, that would be an array of structs?
So if I want to send a couple different types of records, with multiple instances of 1 of those types, I might have...
an array to represent passing multiple object types
a value for each type
a single struct for the single record of one type
an array of structs for multiple records of a single type
Doh, don't try to figure out the spec, just use the library code! For my case above, I (in Python):
started out with a tuple of dictionaries
each dictionary's key was the record/object type
if only a single instance of a type was allowed to be passed, then that dictionary value would be a dictionary
if multiple instances of a certain type might be passed together, then the value of that dictionary would be a tuple of dictionaries
Ironic outcome - partner decided not to do very much interop, and for the one use-case that we did do it, I had to mimic an embedded system and send hex over UDP!