Xpath，找到两个其他节点之间的节点

Question

我需要构建一个通用的XPath来查找正确的节点，其中的标准是日期和时间。例如找到节点“5月3日”，“12:17:44”

XML具有日期和时间标记。 不方便的是，日期标记仅填充为当天的第一个事件。 （时间标记总是被填充）

我已经试过这样：

/itemisationTable/row[@Date="03 May"]/following-sibling::row[@Time="12:17:44"] 

它工作正常，但它是不正确的，因为这

/itemisationTable/row[@Date="03 May"]/following-sibling::row[@Time="21:12:06"] 

还发现一个结果，它不应该。

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我的另一个问题是，

/itemisationTable/row[@Date="03 May"]/following-sibling::row[@Time="09:34:13"] 

应该找到一个节点，但事实并非如此。

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如果有人可以帮助我使用XPath，因为它超出了我的Xpath技能，所以我会很感激。

这里是XML

<itemisationTable index="1" name="Belgium - SMS/Data" total="1.522"> 
<row Date="03 May" Time="09:34:13" Number="xphone.com" Description="Roaming Data" Origin="Belgium" Destination="Other Provider" InBundle="" Taxable="T" Duration="12.57 MB" Cost_exc_VAT="1.258" /> 
<row Date="" Time="10:43:41" Number="4428" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="10:43:44" Number="4428" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="12:17:44" Number="4408" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="21:10:50" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="21:11:55" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="04 May" Time="21:12:06" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="21:22:34" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="21:23:23" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="21:23:31" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="05 May" Time="21:23:56" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="21:30:45" Number="4412" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="22:24:35" Number="4431" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="" Time="22:24:38" Number="4431" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
<row Date="06 May" Time="" Number="xphone.com" Description="Roaming Data" Origin="Belgium" Destination="Other Provider" InBundle="" Taxable="T" Duration="2.59 MB" Cost_exc_VAT="0.264" /> 
<row Date="" Time="07:09:15" Number="4483" Description="xphone SMS" Origin="Belgium" Destination="UK" InBundle="B" Taxable="" Duration="1" Cost_exc_VAT="0.000" /> 
</itemisationTable> 

Answer 1

整蛊的一个片段！这不是特别有效，但它是工作解决方案（使用XPath 2.0）：

/itemisationTable 
    /row[@Date=$date] 
    /(self::row | following-sibling::row[ 
    not(./preceding-sibling::row[@Date != ""][1]/@Date != $date) 
    ][not(./@Date != "" and ./@Date != $date)])[@Time=$time] 

在XPath 1.0，这得到多毛：

/itemisationTable 
    /row[@Date=$date] 
    /following-sibling::row[ 
    not(./preceding-sibling::row[@Date != ""][1]/@Date != $date) 
    ][not(./@Date != "" and ./@Date != $date)][@Time=$time] 
| /itemisationTable/row[@Date=$date][not(./@Date != "" and ./@Date !=$date][@Time=$time] 

设置$date和$time通过你的XPath引擎 - 在XMLStarlet中，例如，这将是--var date='"03 May"';在XQuery引擎中评估XPath将与declare variable $date="03 May";等等。

重要的是使用preceding-sibling回溯并查看您是否越过边界，排除任何真的节点。

对于具有足够表现力的语言来构建高效的解决方案，我想切换到XQuery。

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要允许复制/粘贴测试，下面已经成功地使用在http://www.freeformatter.com/xpath-tester.html：

/itemisationTable /row[@Date="03 May"] /following-sibling::row[  not(./preceding-sibling::row[@Date != ""][1]/@Date != "03 May") ][not(./@Date != "" and ./@Date != "03 May")][@Time="21:11:55"] | /itemisationTable/row[@Date="03 May"][not(./@Date != "" and ./@Date != "03 May")][@Time="21:11:55"]