Xml 根据同一级别的值在XPath中选择值

我得到了这个部分XML

 <Events>
   <Properties>
     <Property Descriptor="1">VALUE1</Property>
     <Property Descriptor="2">FOO</Property>
     <Property Descriptor="3">BAR</Property>
     </Properties>
   <Properties>
     <Property Descriptor="1">VALUE2</Property>
     <Property Descriptor="2">NO</Property>
     <Property Descriptor="3">NOTHINGHERE</Property>
   </Properties>
 </Events>

价值1
福
酒吧
价值2
不
什么都没有

嗨，当Property Descriptor=“2”=“FOO”时，我可以查询Property Descriptor=“3”的第一个匹配项吗？这里的结果应该是

BAR

我尝试了

//Properties/Property[@Descriptor=“3”][..//Property[@Descriptor=“2”]=“FOO”]

，但它现在可以工作了

当Property Descriptor=“2”=“FOO”时，我是否可以查询Property Descriptor=“3”的第一个匹配项

更详细地说：

/Events/Properties                    Look for a Properties element
[Property                             but only if it has a Property element
[@Descriptor = '2'] = 'FOO']          but only if its Descriptor attribute equals 2 and
                                      its textual content is "FOO"
/Property[@Descriptor = '3']          for that Properties element look for a child element
                                      called Property where the Descriptor attribute equals 3
[1]                                   thereof return the first occurrence

当Property Descriptor=“2”=“FOO”时，我是否可以查询Property Descriptor=“3”的第一个匹配项

更详细地说：

/Events/Properties                    Look for a Properties element
[Property                             but only if it has a Property element
[@Descriptor = '2'] = 'FOO']          but only if its Descriptor attribute equals 2 and
                                      its textual content is "FOO"
/Property[@Descriptor = '3']          for that Properties element look for a child element
                                      called Property where the Descriptor attribute equals 3
[1]                                   thereof return the first occurrence

当Property Descriptor=“2”=“FOO”时，我是否可以查询Property Descriptor=“3”的第一个匹配项

更详细地说：

/Events/Properties                    Look for a Properties element
[Property                             but only if it has a Property element
[@Descriptor = '2'] = 'FOO']          but only if its Descriptor attribute equals 2 and
                                      its textual content is "FOO"
/Property[@Descriptor = '3']          for that Properties element look for a child element
                                      called Property where the Descriptor attribute equals 3
[1]                                   thereof return the first occurrence

当Property Descriptor=“2”=“FOO”时，我是否可以查询Property Descriptor=“3”的第一个匹配项

更详细地说：

/Events/Properties                    Look for a Properties element
[Property                             but only if it has a Property element
[@Descriptor = '2'] = 'FOO']          but only if its Descriptor attribute equals 2 and
                                      its textual content is "FOO"
/Property[@Descriptor = '3']          for that Properties element look for a child element
                                      called Property where the Descriptor attribute equals 3
[1]                                   thereof return the first occurrence