A simple spreadsheet-based, MIAME-supportive format for microarray data: MAGE-TAB

Table 8 Representing SDRF from Table 2 by a set of two SDRF files: first spreadsheet.

Sample ID	Characteristics [Organism]	Characteristics [OrganismPart]	Protocol REF	Extract ID	Protocol REF	Label	Hybridization ID
liver 1	Homo sapiens	liver	P-XMPL-1	Extract 1	P-XMPL-3	Cy3	Hyb 1
liver 2	Homo sapiens	liver	P-XMPL-1	Extract 2	P-XMPL-3	Cy3	Hyb 1
kidney 1	Homo sapiens	kidney	P-XMPL-1	Extract 3	P-XMPL-3	Cy3	Hyb 2
kidney 2	Homo sapiens	kidney	P-XMPL-1	Extract 4	P-XMPL-3	Cy3	Hyb 2
brain 1	Homo sapiens	brain	P-XMPL-1	Extract 5	P-XMPL-3	Cy3	Hyb 3
brain 2	Homo sapiens	brain	P-XMPL-1	Extract 6	P-XMPL-3	Cy3	Hyb 3
				Extract reference	P-XMPL-3	Cy5	Hyb 1
				Extract reference	P-XMPL-3	Cy5	Hyb 2
				Extract reference	P-XMPL-3	Cy5	Hyb 3

Such splitting of an SDRF spreadsheet can be done on any ID column, which becomes the last column in the first spreadsheet (this table) and is repeated as the first column in the second spreadsheet (Table 9).