Binary descriptions:

libjs-yui3-common: No summary available for libjs-yui3-common in ubuntu utopic.
libjs-yui3-debug: Yahoo User Interface Library v3 (debug files)
libjs-yui3-doc: Documentation and examples for the Yahoo User Interface Library v3
libjs-yui3-full: Yahoo User Interface Library v3 (full, uncompressed files)
libjs-yui3-min: Yahoo User Interface Library v3 (minified files)