xml - XPath with multiple values for same element -

i'm writing xpath query xml file following structure

<products>     <product>    <id></id>    <categories>        <category>38</category>        <category>41</category>        <category>43</category>    </categories> </product> </products> 

i able products matching ids 41 or 43 this

products/product[categories/category[. = '43' or . = '41']] 

i need products matching both ids 41 & 43 , doesn't work

products/product[categories/category[. = '43' , . = '41']] 

what doing wrong? thank in advance.

you can use:

products/product[     categories[category='43']               [category='41'] ] 

product categories containing both category 43 , category 41