Content access basics - Part IV - SRU/SRW/Z39.50

This is the fourth part in a series of articles about standards for accessing content from document sources, particularly in the context of federated search. You can access the first three parts of the series from the following links:

• Content access basics - Part I - screen scraping
• Content access basics - Part II - XML
• Content access basics - Part III - OpenSearch

SRU, SRW, and Z39.50 can be very confusing acronyms to the uninitiated but there are only a few concepts that you need to understand about these standards to have an intelligent conversation about them.

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