Table 4.

RDBMS Fields and Short Descriptions.

#	Search Query	Output Field	Description
1	----	Row#	Index for ease of usage.
2	Organism	Organism	Organism: Complete organism name (in Genus species format; organisms are listed using the NCBI scientific name).
3	Cell Location	L	Cell Location: Chloroplast (C), Cyanelle (Y), Mitochondrion (M), Nucleus (N), or Virus (V).
4	RNA Type	RT	RNA Type: rRNA (R) or Intron (I). (mRNA, tRNA, SnRNA, and Other are presently unsupported.)
5	RNA Class	RC	RNA Class: Detailed classification within RNA Types.
6	Exon	EX	Exon sequence containing the intron. The expanded names for the exon abbreviations are available online.
7	----	IN	Intron Number: For exon sequences containing multiple introns, the introns are numbered sequentially.
8	Intron Position	IP	Intron Position: Nucleotide (E. coli reference numbering) immediately prior to the intron insertion point.
9	ORF	0	Open Reading Frame presence within intron sequences. Y = an ORF of at least 500 nucleotides is present; N = no ORF of at least 500 nucleotides is present; U = ORF presence/absence was not determined; see also online discussion about ORFs. The ORF identity is sometimes given in the Comment field.
10	Sequence Length	Size	Number of nucleotides in the RNA sequence.
11	----	Cmp	Percent Completeness: estimated completeness of the sequence. Only sequences that are at least 90% complete are included here.
12	Accession Number	AccNum	GenBank Accession Number. Links directly to the GenBank entry at the NCBI web site.
13	Secondary Structures	StrDiags	Structure Diagrams: Links to secondary structure diagrams available from the CRW Site. Users may select sequences with or without structures or all sequences.
14	Common Name	Common Name	From the NCBI Phylogeny, where available.
15	Group ID	Gr.Id	(Partially implemented feature.)
16	Group Class	Gr.Class	(Feature not presently implemented.)
17	Comment	Comment	Additional information about a sequence.
18	Phylogeny	Phylogeny	NCBI Phylogeny for the Organism. The first level is shown; the remainder is available by following the "m" ("more") link.
19	----	Row#	Index for ease of usage.

#: order of appearance of fields in the RDBMS output. Search Query: names of fields on the Search screen; ----, not available as a search criterion. Output Field: names of fields in the RDBMS output. Description: more information about the field and its contents. The RDBMS Search page contains two additional options: Results / Page, which allows users to display 20, 50, 100, 200, or 400 results per page, and Color Display, which toggles alternating colored highlighting of adjacent organisms. Expanded descriptions of each field and the corresponding contents are available online at the CRW RDBMS Help Page.