CONNECTIONS BETWEEN DATABASES

• Information from different databases is connected by means of cross references.

• Cross references are entry attributes that make reference to entries in other databases.

• Not all databases include cross-references.

  • SwissProt and EMBL have fields called DR, which includes cross references to most other databases.
  • The same SwissProt and EMBL include a field called RX, which includes cross references to Medline and PUBMed.