NISO - National Informational Standards Organization

A Framework of Guidance for Buiilding Good Digital Collections
http://www.niso.org/framework/Framework2.pdf

NISO - Understanding Metadata
http://www.niso.org/standards/resources/UnderstandingMetadata.pdf

World Library Index - 18000 libraries
http://www.libdex.com/
 (opac - online public access catalogue) 

There is a large number of systems used by different institutions to compile data and make it accessible.
Interoperability - the ability of different database systems to communicate, by means of crosswalks. (like a translation)

Crosswalks - a means of transfering data from one system to another, like MARC to DublinCore.
http://www.ncecho.org/ncdc/template.html
In Class assignment - MARC to Dublin Core 

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