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Many terms are synonyms of other terms. When there are multiple terms that express the same base concept, SEND controlled terminology provides the preferred term to include in a submission, and thus the term to which the synonymous term(s) should be mapped. The NCI Thesaurus (https://ncit.nci.nih.gov) provides the synonyms. For instance, the unit of degrees Celsius could be expressed as "°C", "degC", "C", "Degrees Celsius", and so on. The SEND preferred term for degrees Celsius is "C." Temperature can also be expressed in terms of degrees Fahrenheit, but this is a different concept from degrees Celsius. The key to mapping is determining which terms are synonymous, not which terms can be converted into one another via a conversion factor (for conversion, see Section 4.5.1.4, Example of Original and Standardized Results and Test Not Done).

Finding the submission value for a source value can be done in 2 ways. First, searching the controlled terminology list can determine whether the source value is in the list. If it is not, the easiest way to search for synonyms is the NCI Thesaurus. The NCI Thesaurus's search functionality searches terms and synonyms and provides the SEND submission value (preferred term).

This example illustrates mapping source units into their controlled terminology preferred term for --ORRESU. Note that in each case, there is only a label change (no conversion calculation).

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Standards for tabulation require representation of dates and/or times, intervals of time, and durations of time in ISO 8601 format as defined by the International Organization for Standardization (ISO) (http://www.iso.org).  Included in specifications...

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