Wow, I'm coming into this thread late ... To answer Godmar up-thread, Evergreen's OpenSearch service returns data in more than 15 formats, including MARCXML and MODS. It was actually the first ILS to do so (with the exception of Ross's Voyager add-on), and also the first ILS to have an unAPI service (which it embeds <link> elements to expose -- part of the non-validation you pointed out). Non-validation (by extension) is an acceptible trade-off in my opinion, since feed readers (the main consumers of ATOM and RSS today -- think a Saved Searches folder in Google Reader or Live Bookmarks your bookmark toolbar) have no problem with the data. Some examples: HTML, with links: http://dev.gapines.org/opac/extras/opensearch/1.1/-/html-full?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword MARCXML: http://dev.gapines.org/opac/extras/opensearch/1.1/-/marcxml?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword MARCXML with some extensions (view source): http://dev.gapines.org/opac/extras/opensearch/1.1/-/marcxml-full?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword MODS: http://dev.gapines.org/opac/extras/opensearch/1.1/-/mods3?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword OAI DC: http://dev.gapines.org/opac/extras/opensearch/1.1/-/oai_dc?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword RSS 2.0: http://dev.gapines.org/opac/extras/opensearch/1.1/-/rss2?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword and even a catalog card mock-up: http://dev.gapines.org/opac/extras/opensearch/1.1/-/htmlholdings?searchOrg=PINES&searchTerms=harry+potter&searchClass=keyword On Tue, Jun 24, 2008 at 3:36 PM, Ross Singer <[log in to unmask]> wrote: [snip] > What accept header would you use for marcxml, mods or dc? > According to the W3C, application/marc-xml or similar (the '-' instead of '+' says it's not a registered MIME type). However, browsers don't work with that well. Put a '+' in there and they'll (generally) render the XML. -- Mike Rylander | VP, Research and Design | Equinox Software, Inc. / The Evergreen Experts | phone: 1-877-OPEN-ILS (673-6457) | email: [log in to unmask] | web: http://www.esilibrary.com