Full Colectica Information Model


Colectica lets you describe statistical datasets, rich information about each variable, and summary statistics.

PI Dataset
A data file, database, or other source of data
DR Data Layout
Describes the layout of a data file
V Variable
A column in a dataset
VS Variable Statistics
Summary statistics for a single variable
NC NCube
Aggregate data
RV Represented Variable
Describes the common information of one or more harmonized variables, including data type information
CV Conceptual Variable
Describes the common information of one or more harmonized variables

Data Collection

Colectica lets you create survey specifications, document existing surveys, build question banks, and more.

I Instrument
A survey or other data capture instrument
Q Question
A question that can appear in a survey instrument
QG Question Grid
A question grid that can appear in a survey instrument
QB Question Block
A question block that can appear in a survey instrument
S Statement
A statement that can appear in a survey instrument
Instruction Instruction
Information for an interviewer or respondent
C Computation
Source code that performs calculations, validation, or other actions
Sequence Sequence
A set of items in an instrument, used for grouping, paging, or other organization
DC Data Collection
Describes the processes and methods used to collect data

Research Lifecycle

Colectica lets you document both individual and repeated studies.

Study Study
A single research project
Series Series
A repeated set of studies
Archive Archive
Information about how a study is archived for long term preservation


All information in Colectica is built on foundational information such as concepts, code lists, and classifications.

Concepts describe the basic ideas being explored by a study. By defining the concepts behind your study, you can more easily create well-organized documentation. Sharing concepts among multiple studies enables quick, painless data harmonization.

Concept Concept
An abstract idea or general notion
Category Category
A class of people or things
CodeList Code List
A list of categories, each with an assigned value
Universe Universe
A population being studied
Organization Organization
An institution, company, or other group


Colectica lets you manage quality statements about your studies, useful for reporting to funding agencies and other authorities.

QualityStatement Quality Statement
A set of statements with information about how a study was conducted
QualityStandard Quality Standard
Describes all information that a quality statement should record

Data Processing

Colectica lets you describe how data is processed from one form into another.

ProcessingEvent Processing Event
Information about who performed data processing and how it was performed
GeneralInstruction General Instruction
Any sort of data processing instructions
GenerationInstruction Generation Instruction
Data processing that creates new variables or datasets

Grouping and Packaging

Most types of items in Colectica can be organized into groups. This allows you to organize things by topic, project, or any other facet you find useful.

Colectica supports the following types of groups.

  • Category Group
  • Code List Group
  • Concept Group
  • Conceptual Variable Group
  • Instruction Group
  • Instrument Group
  • NCube Group
  • Organization Group
  • Processing Event Group
  • Processing Instruction Group
  • Quality Statement Group
  • Question Group
  • Represented Variable Group
  • Universe Group
  • Variable Group

Colectica also supports other ways to package together related items.

RP Metadata Package
A collection of various kinds of metadata items.
Project Project
A collection of series, studies, and metadata packages.