REDCap Data Dictionary LinkML Schema

A LinkML meta-schema that formally models the structure of REDCap data dictionaries (CSV format). This schema defines the rules, constraints, and relationships of all 18 REDCap data dictionary columns, enabling programmatic validation, generation, and transformation of REDCap instruments. It is a vendor-neutral model of REDCap itself; RareLink-style ontology conventions (variable-name prefixes, coded choices, structured field annotations, BioPortal/ontology curation) are layered on top in the rarelink repository, not defined here.

URI: https://w3id.org/linkml/redcap-data-dictionary

Name: redcap_data_dictionary

Classes

Class	Description
Choice	A single permissible value for a dropdown, radio, or checkbox field
DataDictionary	A complete REDCap data dictionary representing one or more instruments (forms...
Field	A single variable (field) in a REDCap data dictionary
Instrument	A logical REDCap instrument (form) grouping related fields

Slots

Slot	Description
branching_logic	Conditional display logic
choices_calculations_slider_labels	For dropdown, radio, and checkbox fields: pipe-delimited list of 'raw_value, ...
custom_alignment	Controls the alignment of the field on the form
field_annotation	REDCap's field annotation column — free text plus action tags (e
field_label	The display label shown to users during data entry
field_note	Supplementary text displayed below the field during data entry
field_type	The type of input field
fields	Ordered list of all fields (variables) in the data dictionary
form_name	The instrument (form) this field belongs to
identifier	Whether this field contains identifying information (PHI)
instrument_label	Human-readable label for the instrument
instrument_name	The form_name shared by all fields in this instrument
is_repeating	Whether this instrument supports repeating instances
label	The human-readable display label for this choice (e
matrix_group_name	Groups multiple radio/checkbox fields into a matrix display
matrix_ranking	Whether ranking is enabled for this matrix group
question_number	Custom question number for surveys
raw_value	The stored value (code) for this choice
required_field	Whether the field is required for form completion
section_header	Optional section header text displayed above this field to visually group fie...
text_validation_max	Maximum allowed value for validated text fields (dates, numbers)
text_validation_min	Minimum allowed value for validated text fields (dates, numbers)
text_validation_type_or_show_slider_number	For text fields: the validation type constraining input format
variable_field_name	The unique variable name for this field

Enumerations

Enumeration	Description
CustomAlignment	Field alignment options for the data entry form
FieldType	The complete set of REDCap field types that determine how a variable is rende...
IdentifierStatus	Whether a field contains Protected Health Information
MatrixRanking	Whether matrix ranking is enabled
TextValidationType	Validation rules for text fields constraining the input format

Types

Type	Description
Boolean	A binary (true or false) value
Curie	a compact URI
Date	a date (year, month and day) in an idealized calendar
DateOrDatetime	Either a date or a datetime
Datetime	The combination of a date and time
Decimal	A real number with arbitrary precision that conforms to the xsd:decimal speci...
Double	A real number that conforms to the xsd:double specification
Float	A real number that conforms to the xsd:float specification
Integer	An integer
Jsonpath	A string encoding a JSON Path
Jsonpointer	A string encoding a JSON Pointer
Ncname	Prefix part of CURIE
Nodeidentifier	A URI, CURIE or BNODE that represents a node in a model
Objectidentifier	A URI or CURIE that represents an object in the model
Sparqlpath	A string encoding a SPARQL Property Path
String	A character string
Time	A time object represents a (local) time of day, independent of any particular...
Uri	a complete URI
Uriorcurie	a URI or a CURIE

Subsets

Subset	Description