将字符串转换为 Marklogic Xquery 中的元素

Question

我有以下 XQuery 脚本，它基本上将属性添加到 MarkLogic 中的现有文档：

xquery version "1.0-ml";
declare namespace xhtml = "http://www.w3.org/1999/xhtml";
declare namespace error="http://marklogic.com/xdmp/error";
declare namespace cdata = "http://www.w3.org/1999/cdata";

declare variable $uri as xs:string external;
declare variable $contentproperties as xs:string external;

xdmp:document-add-properties($uri, ( $contentproperties ) );

外部 C# 程序调用此查询并将以下内容作为 $contentproperties 的字符串传递：

<Title>My Title</Title>,<Date>1629076218</Date>,<SubjectArea>My subject</SubjectArea>,<ContentType>My content type</ContentType>,<Summary>My summary</Summary>

但是，错误 returns 提到：

XDMP-ARGTYPE: (err:XPTY0004) xdmp:document-add-properties("", "My Title,1629076218,My ...") -- arg2 is not of type element()*"

我应该如何将 xs:string 转换为 element()* 类型？

引用文档添加属性方法：https://docs.marklogic.com/xdmp:document-add-properties

Answer 1

您可以tokenize() that string of comma separated values, then use xdmp:unquote() 将XML 字符串解析为XML 文档，然后对元素进行XPath。将该元素序列分配给另一个变量，并使用该变量设置您的属性：

xquery version "1.0-ml";
declare namespace xhtml = "http://www.w3.org/1999/xhtml";
declare namespace error="http://marklogic.com/xdmp/error";
declare namespace cdata = "http://www.w3.org/1999/cdata";

declare variable $uri as xs:string external := "test";
declare variable $contentproperties as xs:string external := "<Title>My Title</Title>,<Date>1629076218</Date>,<SubjectArea>My subject</SubjectArea>,<ContentType>My content type</ContentType>,<Summary>My summary</Summary>";
declare variable $contentproperties-element as element()* := tokenize($contentproperties, ",") ! xdmp:unquote(.)/*;
xdmp:document-add-properties($uri, ( $contentproperties-element ) );

将字符串转换为 Marklogic Xquery 中的元素

Converting string to element in Marklogic Xquery

xquery

marklogic