Is there a way to restrict a string to be ASCII only in XSD?

Question

Although the XML file being described by the XSD Schema may contain any unicode characters in general, there are some fields where only ASCII is allowed. (As these strings are going to be passed to another system which only accepts ASCII.)

Is there a way to specify that in XSD?

A regexp with all possible ASCII characters would be a possibility I suppose, but I feel there must be a better way.

All ASCII characters? Even control codes? Or a subset of ASCII? — skaffman, Mar 20 '12 at 17:10
a regex i found (and which i use) is ``[ -~]`` everything between space and tilde. https://stackoverflow.com/a/24903178/25286 — GDmac, Dec 19 '22 at 12:11

score 6 · Accepted Answer · answered Mar 21 '12 at 13:39

6

You can try that :

<xs:simpleType name="basicLatin">
    <xs:restriction base="xs:string">
        <xs:pattern value="\p{IsBasicLatin}*"/>
    </xs:restriction>
</xs:simpleType>

answered Mar 21 '12 at 13:39

Vincent Biragnet

2,950
15
22

score 2 · Answer 2 · answered Mar 20 '12 at 18:43

2

Unfortunately, for your requirement there isn't a way to restrict without using patterns.

answered Mar 20 '12 at 18:43

Petru Gardea

21,373
2
50
62

Is there a way to restrict a string to be ASCII only in XSD?

2 Answers2