How do I use multiple sources in one index in Sphinx?

[ofi]

The Sphinx config file hints to it supporting multiple sources for one index, how do I actually specify it?Here's the snippet from the config file:\[code\]# document source(s) to index# multi-value, mandatory# document IDs must be globally unique across all sourcessource = src1\[/code\]I've tried setting it in the following formats:\[code\]source = src1, src2source = [src1, src2]\[/code\]and I've also tried using the source variable twice, eg:\[code\]source = src1source = src2\[/code\]I suspect that I'm just being a dunce, as I'm not sure of the syntax to use in the config file. Any ideas?Using the second code snippet I get the following error:\[code\]ERROR: index 'iwa': fulltext fields count mismatch (me=iwa_publications, in=iwa_events, myfields=3, infields=8).\[/code\]The two sources are iwa_events and iwa_publications. Both have unique id columns, and both sources work when indexed individually.