xsl 样式表处理指令中是否可以有可选样式表？
我已使用 将样式表应用到 xml 文档，当在我的应用程序中查看 XML 时，这非常有用。但是，如果导出 xml，我希望 XML 仍呈现为纯 XML，是否可以将样式表作为可选，而不是在找不到样式时产生此错误：
加载样式表时出错：加载 XSLT 样式表时发生网络错误：
I've applied a stylesheet to an xml document using <?xsl-stylesheet ...>, this works great when the XML is being viewed in my application. But if the xml is exported, I want the XML to still render as plain XML, is it possible to have the stylesheet as optional rather than it producing this error when style is not found:
Error loading stylesheet: A network error occured loading an XSLT stylesheet:
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唯一的解决方案是在导出过程中删除 xml-stylesheet。
The only solution is to remove the xml-stylesheet during the export sadly.
（我知道这是一个老问题，但需要更新）
在 XML 中使用
xsl-stylesheet处理指令通常不是一个好主意，因为它的局限性适用性以及因为您将视图绑定到数据。虽然您可以通过让 Web 服务器根据请求的来源返回不同的样式表来使其动态化，但这并不理想。相反，在您的应用程序中，使用任何可用的 XSLT 处理器并在查看器中显示 XML 之前对其进行处理。这很容易构建和维护，并且具有视图（XSLT）与数据（XML）分离的额外好处。正常查看 XML 时，它将不再有 PI，并将显示为常规 XML。
(I know ti's an old question, but it begs for an update)
It's generally not a good idea to use the
xsl-stylesheetprocessing instruction in XML, because of its limited applicability and because you're binding the view to the data. While you could make it dynamic by having your web server return a different stylesheet depending on where the request comes from, this is not ideal.Instead, in your application, use any available XSLT processor and process the XML prior to showing it in the viewer. This is simple to build and maintain and has the added benefit that the view (the XSLT) is separate from the data (the XML). When viewing the XML normally, it will not have the PI anymore and will be shown as regular XML.