OAIster is a union catalog of millions of records representing open archive resources that was built by harvesting from open archive collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH).
This year the ALCTS Forum at ALA MidwinterL1 brought together three perspectives on massaging bibliographic data of various sorts in ways that use MARC, but where MARC is not the end goal. What do you get when you swirl MARC, ONIX, and various other formats of metadata in a big pot? Three projects: ONIX Enrichment at OCLC, the Open Library Project, and Google Book Search metadata.