使用以下 xml 文件,我如何提取一些元标记的文本?例如,我想从带有属性“role”属性的元标记中获取文本“aut”。
<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" version="3.0" xml:lang="en" unique-identifier="pub- id" prefix="cc: http://creativecommons.org/ns#">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
<dc:title id="title">Moby-Dick</dc:title>
<meta refines="#title" property="title-type">main</meta>
<dc:creator id="creator">Herman Melville</dc:creator>
<meta refines="#creator" property="file-as">MELVILLE, HERMAN</meta>
<meta refines="#creator" property="role" scheme="marc:relators">aut</meta>
<dc:identifier id="pub-id">code.google.com.epub-samples.moby-dick-basic</dc:identifier>
<dc:language>en-US</dc:language>
<meta property="dcterms:modified">2012-01-18T12:47:00Z</meta>
<dc:publisher>Harper & Brothers, Publishers</dc:publisher>
<dc:contributor id="contrib1">Dave Cramer</dc:contributor>
<meta refines="#contrib1" property="role" scheme="marc:relators">mrk</meta>
<dc:rights>This work is shared with the public using the Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) license.</dc:rights>
<link rel="cc:license" href="http://creativecommons.org/licenses/by-sa/3.0/"/>
<meta property="cc:attributionURL">http://code.google.com/p/epub-samples/</meta>
</metadata>
</package>
我尝试过使用这样的选择单节点()方法但没有成功:
[xml]$doc = get-content myxmlfile.xml
$node = $doc.selectsinglenode("/package/metadata/meta[@property='role']")
//and
$node = $doc.selectsinglenode("//meta[@property='role']")
// $node is null for both cases
我也尝试过这样使用 Select-XML:
[xml]$doc = get-content myxmlfile.xml
Select-Xml -xml $doc -Xpath "/package/metadata/meta[@property='role']"
//and
Select-Xml -xml $doc -Xpath "//meta[@property='role']"