Xquery从XSD架构获取属性名称和类型？

Question

我正在关注marklogic的教程,

https://developer.marklogic.com/learn/2007-04-schema

在一个场景中,我有xsd文件

    <!-- tutorial.xsd -->
<xs:schema targetNamespace="http://marklogic.com/tutorial"
 attributeFormDefault="unqualified"
 elementFormDefault="unqualified"
 xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="name" type="xs:token"
   abstract="false" nillable="false"/>
  <xs:element name="qualification" type="xs:token"
   abstract="false" nillable="false"/>
  <xs:element name="born" type="xs:date"
   abstract="false" nillable="false"/>
  <xs:element name="dead" type="xs:date"
   abstract="false" nillable="false"/>
  <xs:element name="isbn" type="xs:unsignedLong"
   abstract="false" nillable="false"/>
  <xs:attribute name="id" type="xs:ID"/>
  <xs:attribute name="available" type="xs:boolean"/>
  <xs:attribute name="lang" type="xs:language"/>
  <xs:element name="title" abstract="false" nillable="false">
    <xs:complexType mixed="false">
      <xs:simpleContent>
    <xs:extension base="xs:token">
      <xs:attribute ref="lang" use="optional"/>
    </xs:extension>
      </xs:simpleContent>
    </xs:complexType>
  </xs:element>
  <xs:element name="library" abstract="false" nillable="false">
    <xs:complexType mixed="false">
      <xs:sequence minOccurs="1" maxOccurs="1">
    <xs:element ref="book" maxOccurs="unbounded" minOccurs="1"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:element name="author" abstract="false" nillable="false">
    <xs:complexType mixed="false">
      <xs:sequence minOccurs="1" maxOccurs="1">
    <xs:element ref="name" minOccurs="1" maxOccurs="1"/>
    <xs:element ref="born" minOccurs="1" maxOccurs="1"/>
    <xs:element ref="dead" minOccurs="0" maxOccurs="1"/>
      </xs:sequence>
      <xs:attribute ref="id" use="optional"/>
    </xs:complexType>
  </xs:element>
  <xs:element name="book" abstract="false" nillable="false">
    <xs:complexType mixed="false">
      <xs:sequence minOccurs="1" maxOccurs="1">
    <xs:element ref="isbn" minOccurs="1" maxOccurs="1"/>
    <xs:element ref="title" minOccurs="1" maxOccurs="1"/>
    <xs:element ref="author" minOccurs="0"
   maxOccurs="unbounded"/>
    <xs:element ref="character" minOccurs="0"
   maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute ref="id" use="optional"/>
      <xs:attribute ref="available" use="optional"/>
    </xs:complexType>
  </xs:element>
  <xs:element name="character" abstract="false" nillable="false">
    <xs:complexType mixed="false">
      <xs:sequence minOccurs="1" maxOccurs="1">
    <xs:element ref="name" minOccurs="1" maxOccurs="1"/>
    <xs:element ref="born" minOccurs="1" maxOccurs="1"/>
    <xs:element ref="qualification" minOccurs="1"
   maxOccurs="1"/>
      </xs:sequence>
      <xs:attribute ref="id" use="optional"/>
    </xs:complexType>
  </xs:element>
</xs:schema>

我想从这个xsd中提取属性名称和类型.以下是我的XQuery:

if (xdmp:database-name(xdmp:database()) ne 'Schemas')
then error(
  QName('', 'NOT-SCHEMAS'), 'make sure the content-source is Schemas')
else
doc('tutorial.xsd')
  /descendant::xs:element/@name
(: results :)

我得到以下内容:

name
qualification
born
dead
isbn
title
library
author
book
character

但我需要属性和价值在一起

name xs:token
qualification xs:token
born xs:token

有人可以帮我改写Xquery来实现上面的输出吗？

Answer 1

您只需循环遍历元素,然后获取每个元素的属性.在下面的return语句中,您可以将它们组合成一个字符串,将它们放入一个映射中,或者您需要用它们做什么.

if (xdmp:database-name(xdmp:database()) ne 'Schemas') then 
  error(
    QName('', 'NOT-SCHEMAS'), 'make sure the content-source is Schemas')
else
  for $element in doc('tutorial.xsd')/descendant::xs:element
  where $element/@name and $element/@type
  return $element/@name || " is a " || $element/@type

该where子句要求存在名称和类型属性.您可以将其更改or为获取其中任何一个,或者您只需要$element/@name所有名称,即不存在类型时的事件.