<!ELEMENT targets (target*)>
<!ELEMENT target (id, lab, date, status+, sequence, name?, url*, remark*, sourceOrganism*, databaseRef*)>
<!-- required data items -->
<!-- any lab specified id -->
<!ELEMENT id (#PCDATA)>
<!-- any lab specified id -->
<!ELEMENT lab (#PCDATA)>
<!-- most recent update.  format: YYYY-MM-DD --> 
<!ELEMENT date (#PCDATA)>
<!-- Status.  One or more or the following descriptive terms:
Selected
Cloned
Expressed
Soluble
Purified
Crystallized
Diffraction-quality Crystals
Diffraction
NMR Assigned
HSQC
Crystal Structure
NMR Structure
In PDB
Work Stopped
Test Target
Other -->
<!ELEMENT status (#PCDATA)>
<!-- protein sequence in IUPAC 1-letter codes -->
<!ELEMENT sequence (#PCDATA)>

<!-- optional data items -->
<!-- any lab-specified name for the protein -->
<!ELEMENT name (#PCDATA)>
<!-- any url of interest regarding the protein -->
<!ELEMENT url (#PCDATA)>
<!-- remarks in free text -->
<!ELEMENT remark (#PCDATA)>

<!-- Target Source Organism
Source organism scientific name following the nomenclature
of the NCBI Taxonomy database (http://www.ncbi.nih.gov/Taxonomy).

Wheeler DL, Chappey C, Lash AE, Leipe DD, Madden TL, Schuler GD,
Tatusova TA, Rapp BA (2000). Database resources of the National
Center for Biotechnology Information. Nucleic Acids Res 2000 
Jan 1;28(1):10-4.

Benson DA, Karsch-Mizrachi I, Lipman DJ, Ostell J, Rapp BA,
Wheeler DL (2000). GenBank. Nucleic Acids Res 2000 Jan 1;28(1):15-18.
-->
<!ELEMENT sourceOrganism (#PCDATA)>

<!-- Database codes for target sequences and solved structures
 Examples:

     PDB          1ABC    
     BMRB         5001
     GenBank      U12345.2
     SWISS-PROT   P12544 
     TrEMBL       AAA12345
     PIR          HAHU
-->
<!ELEMENT databaseRef (databaseName, databaseId) >
<!ELEMENT databaseName      (#PCDATA)>
<!ELEMENT databaseId        (#PCDATA)>