This is not as significant a problem as the signing issue, in that there's little reason to use two different algorithm suites in practice, but it's still an error.
这个问题不像签名问题那么严重，这是因为实践中很少有机会使用两个不同的算法套件，但它依旧是一个错误。
2
In practice, an error is reported when something goes wrong that has to do with content, usually unexpected, but not with the structure or well-formedness of an XML document.
实际应用中，当 XML 内容（而不是 格式或结构）出现了意想不到的问题就会报告一个错误。
3
The common practice also might include mechanisms to enable localization of error messages.