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Why does xmlstarlet not select all nodes?

Consider this example from w3schools :

<?xml version="1.0" encoding="ISO-8859-1"?>

<bookstore>

<book category="COOKING">
  <title lang="en">Everyday Italian</title>
  <author>Giada De Laurentiis</author>
  <year>2005</year>
  <price>30.00</price>
</book>

<book category="CHILDREN">
  <title lang="en">Harry Potter</title>
  <author>J K. Rowling</author>
  <year>2005</year>
  <price>29.99</price>
</book>

<book category="WEB">
  <title lang="en">XQuery Kick Start</title>
  <author>James McGovern</author>
  <author>Per Bothner</author>
  <author>Kurt Cagle</author>
  <author>James Linn</author>
  <author>Vaidyanathan Nagarajan</author>
  <year>2003</year>
  <price>49.99</price>
</book>

<book category="WEB">
  <title lang="en">Learning XML</title>
  <author>Erik T. Ray</author>
  <year>2003</year>
  <price>39.95</price>
</book>

</bookstore>

xmlstarlet sel -t -v "// @ category" books.xml

returns only cookie. How to get all attributes named category?

BONUS question: how can I evaluate XPath requests against an XML file without opening it in an editor or program (I want a quick tool). The problem is that loading a huge file into memory causes the editor to crash. Don't tell me eXist is my best bet?

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2 answers

This is what you need?

xml sel -t -m "//@category" -v "." -o " " books.xml

or to split the results on each line

xml sel -t -m "//@category" -v "." -n books.xml

Update

You are right, your XPath was good, you just need different parameters.

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, : XSLT 1.0 XPath string(), (node -set) = > string (first- node). . :

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