ERA Concept Hierarchy Tables

Creates a list of data.tables describing the organizational structure of the ERA concept hierarchy for use in other ERA functions and interactive apps.

CreateConceptLevels()

Value

CreateConceptLevels returns a list of four elements each a data.table:

• Prac.Levels Practice concept organizational levels

• Out.Levels Outcome concept organizational levels

• Prod.Levels Product (also called EU or experimental units) concept organizational levels

• Agg.Levels This data.table describes fields that can be used to aggregate data. Observation = no aggregation; each row of ERA is an observation, Study = the publication/study an observation is reported from, and Location the spatial location of an observation (a combination of latitude, longitude and a buffer of uncertainty). Choice and Choice.Code fields are simplified names/codes for hierarchical concept levels for user selection task. The remaining columns indicate the corresponding column names in the ERA dataset for user selections.