I've done my best to search through the archives for this problem, and found at least one person dealing with a similar issue (with no responses). I'm sure this has been asked more than once before, but my search-fu is apparently lacking.
Essentially, I need to be able to retrieve some metadata (author IDs) along with the multi-valued fields holding document authors; e.g., I search in document titles, I get the doc ID, the list of authors, and *their* IDs, so I can drill down to other papers by these authors. A basic sample of the XML data: <docs> <doc> <id>A001</id> <title>This is a title</title> <authors> <author> <id>111</id> <name>John Smith</name> </author> <author> <id>222</id> <name>Mary Johnson</name> </author> </authors> </doc> <doc> <id>A002</id> <title>And this is another title</title> <authors> <author> <id>222</id> <name>Mary Johnson</name> </author> <author> <id>333</id> <name>Alice Pocahontas</name> </author> </authors> </doc> </docs> The only reasonable option I've thought of is to index the authors twice, with one list of names and one of IDs. It's not clear to me that SOLR guarantees ordered results of these multi-valued fields, though. Another option would be to delimit the ID in some manner so that I could search on and pull the ID from the author fields, but only display the name. A final option, and the one I'm hoping for, is to find that SOLR has some built-in support for this kind of thing. - Andrew
