How to use condtion in xpath

Question

<courses>
<course number = "1" category = "A">
<title>B</title>
</course>
</courses>

I want to pick all @number has category= "A" I try to use //@number[@category/text()='A'], but it seem no work, So how can I get it

Answer 1

To get @number attribute value of <course> node with category='A':

//course[@category='A']/@number

Answer 2

Your XML is invalid, you need quotation marks around 1:

<course number="1" category = "A">

For attribute values, you never need text(). Use

//@number[../@category="A"]

It means:

• //@number: select any number attribute
• [...]: which satisfies the condition
• ../: go up to the parent (element course or other)
• @category: find a category attribute
• ="A": which has the value A