[Sam Sahara]

Originally Posted by Sam Sahara

EDIT ===============================

I've tried putting in a book the following line

<?bag value="3" content="Ferrara"?>

and trying the following expression to add the word "Ferrara" in the ToC:

//processing-instruction("bag")[@value="3"]/@content

but I get only

"calibre, version 3.30.0
ERROR: No items found: No items were found that could be added to the Table of Contents.

Same result with the following expression:

substring-before(substring-after(//processing-instruction('bag'), 'value="3" content="'), '"')