DDI Controlled Vocabulary for Lifecycle Event Type

Code List
Value of the Code	Descriptive Term of the Code	Definition of the Code
StudyProposal	Study proposal	Defining outlines for a new study/data collection, including needs for information and general research objectives, as well as main concepts, study scope and methodology, usually to be presented for approval to funders, partners, or other relevant bodies.
Funding	Funding	Decisions to extend financial support for the study/data collection.
StudyDesign	Study design	Detailed planning for carrying out the study/data collection: refining concepts and identifying ways to measure them, defining the target population, time dimension, sampling frame and sample selection, data collection methodology, production systems and workflows, etc.
InstrumentDesign	Instrument design	Building the data collection instrument, for example, the questionnaire or interview questions, focus group topics, observation forms for an observational design, standardized record review, independent and dependent variables for an experimental design, etc.
QuestionnaireTranslation	Questionnaire translation	Translating the source questionnaire into other languages, for example, in cross-national surveys or in national surveys conducted in multilingual countries.
QuestionnaireAdaptation	Questionnaire adaptation	Changing the wording of questions to reflect cultural or institutional differences if same-language questionnaires are administered in different regions or countries.
InterviewerTraining	Interviewer training	Training the interviewers that administer questionnaires in survey-type studies.
EthicsReview	Ethics review	Review of the study/data collection to ensure that it complies with statutory ethics requirements or regulations, including verification of the informed consent statement, performed by a qualified body, like a Research Ethics Committee, or Institutional Review Board.
LegalReview	Legal review	Review of the study/data collection in terms of compliance with the law (legislation concerning confidentiality, the protection of children, etc.).
Sampling	Sampling	Selecting the sample for the study/data collection.
InstrumentPreTesting	Instrument pre-testing	Small-scale application of the data collection instrument designed to identify potential problems before using it for the entire study.
PilotStudy	Pilot study	Dress rehearsal of the full project, for example, by administering the questionnaire to a small number of people, then coding and analyzing results, etc.
DataCollection	Data collection	Setting up, running and finalizing the data collection process, including follow-up procedures, etc.
DataCollectionReports	Data collection reports	Reports on designing and conducting the data collection process, including methodological decisions and problems encountered. These may take the form of conference posters or presentations, journal articles or online publications, book chapters, etc.
DataProcessing	Data processing	Changes, additions or deletions brought to the data at any point in time after collection.
DataProcessing.Coding	Data processing: Coding	Converting raw data into machine-readable codes.
DataProcessing.Classification	Data processing: Classification	Documenting the meaning/substance of coded data.
DataProcessing.InterviewTranscriptions	Data processing: Transcriptions of interviews	Transferring video- or audio-taped data into written form.
DataProcessing.Weighting	Data processing: Weighting	Calculating weight variables and adding them to the data.
DataProcessing.Aggregation	Data processing: Aggregation	Calculating cumulative measures of individual-level data or microdata.
DataProcessing.CompositeMeasures	Data processing: Composite measures	Calculating scales, indexes, or typologies and adding them to the data.
DataProcessing.Derivation	Data processing: Derivation	Calculating new variables from measured variables, usually by recodes.
DataProcessing.DataQualityChecks	Data processing: Quality checks	Checks for consistency, undocumented codes, missing data representation, etc.
DataProcessing.DataIntegration	Data processing: Data integration	Creating complex datasets by merging related data, for example, hierarchical datasets with multiple but related analysis units, or multiple-wave datasets, or data collected in different countries for a cross-national study, etc.
DataProcessing.DisclosureLimitation	Data processing: Disclosure limitation	Editing the data to prevent identification of subjects, for example, performing anonymization measures like recoding or top-coding sensitive variables like income levels, suppressing some geographic indicators, or replacing personal names with pseudonyms and/or categorizing background or demographic information in qualitative data.
DataProcessing.Imputation	Data processing: Imputation	Replacing missing data points with values calculated according to an imputation technique.
MetadataProduction	Metadata production	Documenting the data, for example, by producing study-level and variable descriptions.
MetadataEditing	Metadata editing	Amending the metadata to reflect changes in the data or to improve or enhance documentation.
MetadataTranslation	Metadata translation	Translating the metadata into another language.
FinalReport	Final report	Complete account on how the study was conducted through all its stages, often required by funders or other administrative bodies.
Evaluation	Evaluation	Analysis of how the study, in all its stages, was managed and/or conducted, including the outcome of methodological, technical, and business decisions. May serve as a basis for changes or improvements in planning future iterations of the data collection, or entirely new projects.
OriginalRelease	Original release	First release of data and/or metadata to other individuals and/or agencies than the study producers.
Deposit	Deposit	Handing over the data and available metadata (Submission Information Package in OAIS terms) to a data archive or repository for preservation, possible further processing, and dissemination.
PreservationPackageProduction	Preservation package production	Producing a preservation package of the data for archiving purposes (Archival Information Package in OAIS terms).
DisseminationPackageProduction	Dissemination package production	Producing a dissemination package for distribution of the data (Dissemination Information Package in OAIS terms).
DisseminationPackageRelease	Dissemination package release	Publishing or otherwise making the dissemination package available to users.
DataAnalysisReports	Data analysis reports	Reports describing how the data were analyzed, as well as the resulting findings. These may take the form of conference posters or presentations, journal articles or online publications, books, book chapters, etc.
NewVersionRelease	New version release	Publishing or otherwise making a new version of the data and/or metadata available to users.
Other	Other	Use if the event type is known, but not found in the list.

DDI Controlled Vocabulary for Lifecycle Event Type

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