DECOR-dataset
A DECOR project contains one or more datasets. When there are multiple datasets, they are different versions of the same dataset. It is not recommended to create datasets for different healthcare projects in the same DECOR project.
A dataset consists of (healthcare) concepts. You can see a DECOR dataset as an hierarchical concept repository. Concepts should be well-defined and can be demonstrated with the following examples:
Examples |
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The following datatypes are available (items printed as bold are part of the current DECOR implementation).
Datatype | Nederlands | Deutsch | Description |
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count | teller | Zähler | Countable (non-monetary) quantities. Used for countable types such as:
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code | code | Code | A system of valid symbols that substitute for specified concepts e.g. alpha, numeric, symbols and/or combinations, usually defined by a formal reference to a terminology or ontology, but may also be defined by the provision of text |
ordinal | ordinaal | Ordinal | Models rankings and scores, e.g. pain, Apgar values, etc, where there is a) implied ordering, b) no implication that the distance between each value is con- stant, and c) the total number of values is finite. Note that although the term ‘ordinal’ in mathematics means natural numbers only, here any integer is allowed, since negative and zero values are often used by medical professionals for values around a neutral point.
Examples of sets of ordinal values:
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identifier | identificatie | Identifikation | Type for representing identifiers of real-world entities. Typical identifiers include drivers licence number, social security number, prescription id, order id, and so on. |
string | string | Zeichenkette | |
text | string met opmaak | Zeichenkette mit Formatierung | A text item, which may contain any amount of legal characters arranged as e.g. words, sentences etc. Visual formatting and hyperlinks may be included. |
date | datum | Datum | Represents an absolute point in time, as measured on the Gregorian calendar, and specified only to the day. Semantics defined by ISO 8601. Used for recording dates in real world time. The partial form is used for approximate birth dates, dates of death, etc. |
datetime | datum+tijd | Datum+Zeit | Represents an absolute point in time, specified to the second. Semantics defined by ISO 8601. Used for recording a precise point in real world time, e.g. the exact date and time of the birth of a baby, and for approximate time stamps, e.g. the origin of an history observation which is only partially known. |
complex | collectie van data | Sammlung von Daten | |
quantity | hoeveelheid | Menge | Quantitified type representing "scientific" quantities, i.e. quantities expressed as a magnitude and units.
There are some "special" quantities (used in healthcare), explained later:
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duration | tijdsduur | Dauer | Is a quantity, represents a period of time with respect to a notional point in time, which is not specified. A sign may be used to indicate the duration is “backwards” in time rather than forwards. |
boolean | boolean | Boolean | Items which are truly boolean data, such as true/false or yes/no answers. |
blob | binair | Binär | Things that are typically stored as binary objects in the computer world and need to be rendered appropriately, e.g.
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currency | valuta | Währung | Monetary quantities |
ratio | ratio | Ratio | A ratio of two Quantity values - a numerator and a denominator |
The datatypes can be further restricted using the following datatype facets:
Facet | Description | Example | Applies to |
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unit | Unit for quantities | kg, mmol | quantity |
minInclude | Range min include for quantities | 1, 100 | count, ordinal, quantity, currency |
maxInclude | Range max include for quantities | 1, 100 | count, ordinal, quantity, currency |
fractionDigits | Fraction digits for quantities"1" for at least 1 or "1!" for exactly 1 | "1" for at least 1, "1!" for exactly 1 | quantity |
timeStampPrecision | Precisions for timing specs | date, datetime | |
default | Default value | all datatypes | |
fixed | Fixed value | all datatypes | |
minLength | Minimum length for strings | string | |
maxLength | Maximum length for strings | string |
Facet timeStampPrecision takes the following values
timeStampPrecision | value |
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Y | at least year (YYYY) |
Y! | only year (YYYY) |
YM | at least month (MM) and year (YYYY) |
YM! | only month (MM) and year (YYYY) |
YMD | at least day (DD), month (MM) and year (YYYY) |
YMD! | only day (DD), month (MM) and year (YYYY) |
YMDHM | at least day (DD), month (MM) and year (YYYY), hour (hh) and minute (mm) |