Presentation: Common presentation formats for each data element are defined. Data elements that are presented in a screen or a form will conform to the defined presentation format.
Presentation completeness: Each data presentation format can convey all information within the attributes. Every defined presentation format will be verified to ensure that it can present all values the displayed attribute can take.
Null presentation: Standards for the presentation of missing information for each data type are defined. Any data element that may be null must have a defined representation for the absent value. If there are multiple reasons for absent values that can be captured in the data (e.g., "unavailable" vs. "not applicable") there will be multiple null representations.
Capture and collection: Data entry edits and data importation rules should be defined for each data element. Participants must apply the defined data edit and collection rules.
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