The time method or time dimension of the data collection. The use of the attribute "method" as a means of specifying a controlled vocabulary concept is DEPRECATED. To specify the use of a Controlled Vocabulary or standard concept use the internal element "concept". If multiple concepts are needed the parent element should be replicated. Internal text related to each concept should be allocated to accompany the relevant concept. DDI provides a Controlled Vocabulary for this location: "TimeMethod". For forward-compatibility, DDI Lifecycle XHTML tags may be used in this element.
<timeMeth>
<concept vocab="TimeMethod" vocabURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/" vocabInstanceURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/91403e2" vocabInstanceCodeTerm="Longitudinal.Panel">Longitudinal: Panel</concept>
panel survey
</timeMeth>
<timeMeth>
<concept vocab="TimeMethod" vocabURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/" vocabInstanceURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/01558f3" vocabInstanceCodeTerm="CrossSection">Cross-Section</concept>
cross-section
</timeMeth>
<timeMeth>
<concept vocab="TimeMethod" vocabURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/" vocabInstanceURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/8470cc4" vocabInstanceCodeTerm="Longitudinal.TrendRepeatedCrossSection">Longitudinal: Trend/Repeated cross-section</concept>
trend study
</timeMeth>
<timeMeth>
<concept vocab="TimeMethod" vocabURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/" vocabInstanceURI="http://rdf-vocabulary.ddialliance.org/cv/TimeMethod/1.2.3/c4efcd7" vocabInstanceCodeTerm="TimeSeries">Time Series</concept>
time-series
</timeMeth>