xs:NCName

Construct an NCName value from an item value.

Related Syntax Constructs

The following construct(s) refer to this construct:

[ Syntax | Description | Argument | Examples ]

Syntax

xs:NCName(item $value) => NCName

Description

This is a constructor function that takes an item value as argument and returns a value of type xs:NCName. If the argument is a string literal, then the literal must be a valid lexical form of its type.

As specified in the respective section of the W3C recommendation XML Schema Part 2: Datatypes, a value of type xs:NCName denotes a "non-colonized" XML name, as defined in the XML 1.0 recommendation. It is derived from the type xs:Name and the lexical form of xs:Name is the set of all strings that match the production of Name. Practically, a value of type xs:NCName is the same as of type xs:Name with the only exception that it may not contain a colon.

Argument

$value	item value

Examples

The following queries generate valid values of type xs:NCName
```
xs:NCName("_header")
```
```
xs:NCName("R2D2")
```
The following queries generate invalid values:
```
xs:NCName("-header")
```
```
xs:NCName("R2D2:C3PO")
```