The SAGE library tool web interface allows users to upload and manage SAGE library data.

		Cross-tabulated reports of selected SAGE libraries may be created on-line. Reports may be filtered by tag count, gene name, or other attributes.
		Users may select to include annotation from NCBI UniGene, NCBI LocusLink, and the Gene Ontology Consortium.
		Flags warn of linker tags, repetitive tags, multiple match tags, and tags matching ribosomal RNA, mitchondrial DNA, or retrotransposons.
		Report items shown in blue are links to the appropriate data source.
		Users may browse the report on-line or opt to create a text report for download, retaining the active links if desired.

		Groups of libraries may be compared using the Student's t-test modified to account for normal between-library variation.