escape-uri

The escape-uri() function applies the URI escaping conventions defined in RFC 2396 to an input string. For example, «escape-uri("my document.xml", true()) » returns the string «my%20document.xml ».

Argument	Data Type	Meaning
value	xs:string	The input string, to which URI escaping is to be applied
escape-reserved	xs:boolean	Set to true if characters with a reserved meaning in URIs (for example «/ » and «# ») are to be escaped
Result	xs:string	The URI in its escaped form, as a string.

exactly-one

The exactly-one() function returns its argument unchanged, provided that it is a sequence containing exactly one item. In other cases, it reports an error.

Argument	Data Type	Meaning
Value	item()*	The input value. Although the function signature says that any sequence of items is allowed, a runtime error will occur if the number of items is not exactly one
Result	item()	The same as the supplied value, after checking to ensure that it contains a single item

exists

The exists() function returns true if and only if a supplied sequence contains at least one item.

Argument	Data Type	Meaning
sequence	item()*	The input sequence
Result	xs:boolean	true if the input sequence is non-empty, otherwise false

expanded-QName

The expanded-QName() function returns a value of type xs:QName, given a namespace URI and a local name .

Argument	Data Type	Meaning
namespace	xs:string	The namespace URI part of the xs:QName, or a zero-length string to construct a QName that is in no namespace
local-name	xs:string	The local part of the xs:QName. This must conform to the XML rules for an NCName
Result	xs:QName	The newly constructed xs:QName

false

This function returns the boolean value false. There are no arguments.

	Data Type	Meaning
Result	xs:boolean	The xs:boolean value false

floor

The floor() function returns the largest integer value that is less than or equal to the numeric value of the argument. The result has the same data type as the supplied value, for example if the supplied value is an xs:double then the result is returned as an xs:double .

For example, the expression «floor(11.3) » returns the decimal value 11 , while «floor(-11.3) » returns -12 .

Argument	Data Type	Meaning
value	Numeric	The supplied number
Result	Numeric	The result of rounding down the supplied number to the integer below. The result has the same primitive data type as the supplied value

hours-from-dayTimeDuration

This function extracts the hours component of a dayTimeDuration , as an integer. For example, if the supplied duration is «PT3 6H » , the result will be 12 .

Argument	Data Type	Meaning
input	xdt:yearMonthDuration	The value from which the hours component is to be extracted
Result	xs:integer	The number of hours in the duration, after normalizing it so that 60 minutes is represented as one hour and 24 hours is represented as one day. The value will be negative if the duration is negative

hours-from-time /dateTime

This entry covers two related functions: hours-from-dateTime() and hours-from-time() .

These functions extract the hour of the day from an xs:time or xs:dateTime value, as an integer in the range 0 to 23. The value that is returned is in the original (localized) timezone associated with the time or dateTime value.

Argument	Data Type	Meaning
input	xs:dateTime? or xs:time?	The value from which the hours component is to be extracted. The data type of the supplied argument must correspond to the data type implied by the function name
Result	xs: intege r	The hours component of the time