xpath to pull nodes based on element partial match - xpath

Question

On the below xml snip i'd like to pull row nodes for different batches which is essentially a time stamp, i.e., JP1800 stands for Japan 18 o'clock time.
//*[Batch='LN12000'] pulls all London noon nodes while
data/row pulls all of them including empty Batch values.
How would I pull all London times as //*[Batch='LN'*] does not work?
<?xml version="1.0"?>
-<data>
+<header>
+<row>
+<row>
+<row>
-<row>
<Date>2019-10-21</Date>
<Series>23</Series>
<OnTheRun>N</OnTheRun>
<Depth>0</Depth>
<Batch>JP1700</Batch>
</row>
-<row>
<Date>2019-10-21</Date>
<Series>23</Series>
<OnTheRun>N</OnTheRun>
<Depth>4</Depth>
<Batch>JP1800</Batch>
</row>

Answer 1

It sounds like you're looking for something like starts-with function. :
//header/row/Batch[starts-with(.,"LN")]
And here we have some PHP code exemple, look:
<?php
$xml = <<<XML
<?xml version="1.0"?>
<data>
<header>
<row>
<Date>2019-10-21</Date>
<Series>23</Series>
<OnTheRun>N</OnTheRun>
<Depth>0</Depth>
<Batch>JP1700</Batch>
</row>
<row>
<Date>2019-02-05</Date>
<Series>27</Series>
<OnTheRun>X</OnTheRun>
<Depth>89</Depth>
<Batch>LN9877</Batch>
</row>
</header>
</data>
XML;
$dom = new DOMDocument();
$dom->loadXML($xml);
$xpath = new DOMXPath($dom);
$query = $xpath->query('//header/row/Batch[starts-with(.,"LN")]');
/** #var DOMElement $node */
foreach ($query as $node) {
print($node->nodeValue); //outputs LN9877
}
https://www.w3.org/TR/1999/REC-xpath-19991116/#function-starts-with