Help:Type External identifier

External identifier CiteRef::gh:smw:1708 is a datatype that associates a text value to an external URL. It was introduced with.

Usage
For example, a value annotation like  is going to be represented as:
 * in case the required
 * is denoted on the relevant property page that specifies the NDL ID property.

Features and limitations

 * This datatype is a text type that requires to be denoted on the property page that uses this this type
 * The annotated URI in the  property is expected to define a place holder   to mark the position of the value
 * This datatype can easily be combined with or  to build restricted constraints as to what value inputs are expected or allowed
 * This datatype also supports the  display formatter starting with .CiteRef::gh:smw:2815

Examples

 * https://sandbox.semantic-mediawiki.org/wiki/Property:NDL_ID
 * https://sandbox.semantic-mediawiki.org/wiki/Property:EC_number
 * https://sandbox.semantic-mediawiki.org/wiki/Triacylglycerol_lipase
 * https://sandbox.semantic-mediawiki.org/wiki/Attribut:Has_GND