XML模式中复杂的元素数量增加

I'm trying to create a XSD schema rule that allows the following:

我正在尝试创建一个允许以下内容的XSD架构规则:

<Polynom>
  <Order>
    <Coefficients>
      <Coefficient>0</Coefficient>
    </Coefficients>
    <Coefficients>
      <Coefficient>1</Coefficient>
      <Coefficient>0</Coefficient>
    </Coefficients>
    <Coefficients>
      <Coefficient>3</Coefficient>
      <Coefficient>2</Coefficient>
      <Coefficient>1</Coefficient>
    </Coefficients>
  </Order>
</Polynom>

Now if it was only this it would be simple, however it should be possible to vary the amount of Coefficients. So if I add another one, that one MUST have four Coefficient

现在如果它只是这样简单,但应该可以改变系数的数量。因此,如果我添加另一个,那一个必须有四个系数

I'm not even sure this is possible with xsd?

我甚至不确定这可以用xsd吗?

Update: Just to clarify, the first Coefficients must have one and exactly one Coefficient, then n-th Coefficients in a set of n Coefficents must have n Coefficient.

更新:为了澄清,第一个系数必须有一个且恰好是一个系数,那么一组n个系数中的第n个系数必须具有n个系数。

1 个解决方案

#1

Your constraint can be expressed in XSD 1.1 using xs:assert:

您的约束可以使用xs:assert在XSD 1.1中表示:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" vc:minVersion="1.1">

  <xs:element name="Polynom">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Order">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Coefficients" maxOccurs="unbounded">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element name="Coefficient" maxOccurs="unbounded" 
                                type="xs:integer"/>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
            <xs:assert test="every $c in Coefficients satisfies
                             count($c/Coefficient) = count($c/preceding-sibling::*) + 1"/>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
     </xs:complexType>
  </xs:element>
</xs:schema>

Your constraint cannot be expressed in XSD 1.0.

您的约束无法在XSD 1.0中表示。

#1