Restricting to values of 01 through 10 in XSD?

Question

I'm trying to understand the use of patterns in XSD. Hows does '+' in a pattern for a restriction work in XSD?

After some research, I found out that I can use restrictions with patterns. I do understand that the "+" means 1 or more. But will it also apply in this case?

<xsd:simpleType name="typeNumber">
        <xsd:restriction base="xsd:ID">
            <xsd:pattern value="nr[0-9]+"/>
        </xsd:restriction>
    </xsd:simpleType>

Will, for example, the value nr12345 be valid? Furthermore, I would like to know how it would be possible to make the acceptable value between nr01 and nr10.

Should be possible to apply the XSD against some XML and observe the results.. this should be used to be able to form a more complete base question/hypothesis. — user2864740, Aug 28 '18 at 22:34
There are also resources on what the regular expressions are supported by patterns are allowed for XML, eg. https://www.regular-expressions.info/xml.html , http://infohost.nmt.edu/~shipman/soft/rnc/xsd-regex.html , http://www.xmlschemareference.com/regularExpression.html (searched for "xml pattern regex") — user2864740, Aug 28 '18 at 22:36
Matching: `nr01..nr10` is the same as matching `nr01..nr09` *or* `nr10`. Should be able to use that in conjunction with the current pattern and links above. The alternation (`|`, aka "either or") operator will be useful. — user2864740, Aug 28 '18 at 22:36
Frankly, if only ten values are allowed, I would be inclined to use an enumeration rather than a pattern. — Michael Kay, Aug 29 '18 at 07:51

kjhughes · Answer 1 · 2018-08-29T01:22:01.107

2

This XSD type,

<xsd:simpleType name="typeNumber">
    <xsd:restriction base="xsd:ID">
        <xsd:pattern value="nr0[1-9]"/>
        <xsd:pattern value="nr10"/>
    </xsd:restriction>
</xsd:simpleType>

will allow nr01 through nr09 and nr10, as requested, without needing +, which, yes, does mean 1 or more occurences.

edited Aug 29 '18 at 01:22

answered Aug 29 '18 at 00:08

kjhughes

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score 0 · Answer 2 · answered Feb 08 '19 at 09:59

You may use

<xsd:simpleType name="typeNumber">
    <xsd:restriction base="xsd:ID">
        <xsd:pattern value="nr(0?[1-9]|10)"/>
    </xsd:restriction>
</xsd:simpleType>

Details

The regex will match an entire string that matches

nr - nr at the start of the string
(0?[1-9]|10) - an optional 0 followed with a non-zero digit (see 0?[1-9] alternative) or (|) 10 value.

Restricting to values of 01 through 10 in XSD?

2 Answers2