属性值“ 001”为0。启用命名空间时，类型ID的ID必须为NCName [英] Attribute value "001" of type ID must be an NCName when namespaces are enabled

问题描述

所以我要使用自己的DTD创建xml文件。

So i'm creating a xml file with my own DTD.

简化的XML如下：

<!DOCTYPE catalog [
<!ELEMENT catalog (product+)>
<!ELEMENT product (title?, price, creation_date?, weight?, color, description?)>
<!ELEMENT creation_date (day, month, year)>

<!ATTLIST product category (art|dinner_set|ovenware) "art">
<!ATTLIST product id ID #REQUIRED>

<!ELEMENT id (#PCDATA)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT price (#PCDATA)>
<!ELEMENT day (#PCDATA)>
<!ELEMENT month (#PCDATA)>
<!ELEMENT year (#PCDATA)>
<!ELEMENT weight (#PCDATA)>
<!ELEMENT color (#PCDATA)>
<!ELEMENT description (#PCDATA)>
]>

<?xml-stylesheet type="text/xsl" href="test.xsl"?>
<catalog>
    <product category="art" id="001">
        <title>1Blue Sculpture</title>
        <price>$2000</price>
        <creation_date>
            <day>11</day>
            <month>08</month>
            <year>2014</year>
        </creation_date>
        <weight>257g</weight>
        <color>Green</color>
        <description>A beutiful Green Sculpture</description>
    </product>

当我尝试通过XML Validater运行它时，出现错误属性值 001启用名称空间时，类型ID必须为NCName。对于每个id属性。

When i try and run it through a XML Validater i get an error "Attribute value "001" of type ID must be an NCName when namespaces are enabled." for each of the id attributes.

我已经对其进行了一段时间的修改，似乎不允许数字，字母很好并且可以顺利通过，但是只要设置id =（任何数字），就会给我错误。

I've mucked around with it for awhile and it seems to not allow numerals, letters are fine and it passes without any problems, but as soon as you set id="(any numbers)" it gives me the error.

我是一个完整的XML NOOB，所以我猜它很简单，我

Im a complete XML NOOB, so i'm guessing its something simple, i searched around but couldnt find anything definitive that was easy to do/undertsand.

推荐答案

是的，问题在于属性值 001 。类型为 ID 的属性值必须与XML语法的 Name 生成形式匹配，这意味着数字（以及其他一些字符）

Yes, the problem is the attribute value 001. Attribute values of type ID must match the Name production of the XML grammar, which means that digits (and some other characters) are disallowed as initial characters.

属性值，例如 x001 或 id_001 可以。

参考：

• http://www.w3.org/TR/xml/#sec-attribute-types


• http：// www.w3.org/TR/xml/#sec-common-syn

• http://www.w3.org/TR/xml/#sec-attribute-types
• http://www.w3.org/TR/xml/#sec-common-syn

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