CODEWITHSUNDEEP
xmlxsdxsd-validation
Grainier
Grainier

Reputation: 1654

Why XSD date type consider YYYYY-MM-DD as a valid date?

I have an XSD with the following element

<element name="fromDate" type="date" maxOccurs="1" minOccurs="1" />

And I have an XML with the following element

<fromDate>20100-11-22</fromDate>

If I validate that XML against the above XSD, it gives no errors and takes 20100-11-22 as a valid date. Why is this happening? How to force it to check for YYYY instead of taking YYYYY also as valid?

Update

Upon further reading, found out that according to W3C specs lexical representation on date time allows "four-or-more digit optionally negative-signed numeral that represents the year" [1].

[1] https://www.w3.org/TR/xmlschema-2/#dateTime-lexical-representation

Upvotes: 1

Views: 785

Answers (1)

kjhughes
kjhughes

Reputation: 111726

You can use a xs:pattern to restrict the number of year digits to four, if you don't care about a Y2K-like problem in the year 10,000:

<xs:simpleType name="ShortSightedDate">
  <xs:restriction base="xs:date">
    <xs:pattern value="\d{4}-\d{2}-\d{2}"/>
  </xs:restriction>
</xs:simpleType>

Upvotes: 1

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