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. 2013 Sep 18;8(Suppl 1):15–29. doi: 10.2147/IJN.S40974

Figure 3.

Figure 3

Entity–Relationship (E-R) diagram shows how we extend the existing Drupal CMS E-R diagram to include NEI data.

Notes: The basic entities in the Drupal core are content, user, role, and permission type. The entity “NEI Bibliography” extends the Drupal content to represent a bibliographic record. And the entity “NEI Characterization” extends the Drupal content to represent an NEI characterization record.

Abbreviations: CMS, Content Management System; MIME, Multipurpose Internet Mail Extensions; NEI, nanomaterial environmental impact.