EXSLT - date:hour-in-day - Version 1

The date:hour-in-day function returns the hour of the day as a number. If no argument is given, then the current local date/time, as returned by date:date-time is used the default first argument.

The date/time string specified as the first argument is a right-truncated string in the format defined as the lexical representation of xs:dateTime in one of the formats defined in [XML Schema Part 2: Datatypes]. The permitted formats are as follows:

• xs:dateTime (CCYY-MM-DDThh:mm:ss)
• xs:time (hh:mm:ss)

If the date/time string is not in one of these formats, then NaN is returned.

The second argument is a the name of a date format (declared by date:date-format) that is used to work out the numerical hour of the day. For details about how the format pattern is constructed and used, see date:date-format). The numbering of the hours always begins at 0 (i.e. the hour of 00:00:00 is 0).