Databases and Systems

hierarchical text. The genome map is handled by Java applets. The sequence
similarity relationships of genes within and across species are analyzed in KEGG to
identify functional relationships. Thus, the information of orthologous and
paralogous genes is represented in the ortholog group table, which is a simple HTML
table.
Database Management Systems
DBGET/LinkDB system
Table 2. Different types of network data in KEGG.
The DBGETLinkDB system [4] is an in-house developed database management
system written in C++ that provides the basis for integrating different resources
within KEGG and also with other existing databases. DBGETLinkDB integrates a
diverse range of databases at the level of entries. An entry in the web of molecular
biology databases is uniquely identified by the combination of the database name and
the entry name (or accession number)
database:entry
and the relation between two entries within and across databases is represented by the
binary relation:
database1:entry1 database2:entry2
This concept has been extended to include gene catalogs in KEGG. Any gene (or
gene product) in the web of biological organisms is uniquely identified by the
combination of the organism name and the gene name
organism:gene
and the relation between two genes (or gene products) within and across organisms is
represented by the binary relation:
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