is about library source NCBI SRA library source 2026-01-29T00:00:09.532Z https://www.ncbi.nlm.nih.gov/core/assets/sra/files/SRA_metadata_acc_example.xlsx PCDS: TRANSCRIPTOMIC NCBI SRA library_source PCDS: Provide the library source by selecting a value from the pick list. For amplicon sequencing select 'Viral RNA'. PCDS: See NCBI SRA template for details. PCDS:ncbi_sra_library_source These metadata fields are defined specifically for use with the NCBI SRA submission template. They are organizational constructs intended to support a particular template and underlying database and should not be reused to model metadata outside the intended context. Where possible, more general, template‑independent terms should be used instead. library source requires discussion data field