$ perl xpather.pl ravi06.xml
/book:bookResource/book:book/book:meta/book:title/book:subTitle

# posy
/book:bookResource[1]/book:book[1]/book:meta[1]/book:title[1]/book:subTitle[1]

# star
/*[ name() = "book:bookResource" and position() = 1 ]
/*[ name() = "book:book" and position() = 1 ]
/*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate = "
2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
/*[ name() = "book:title" and position() = 1 and @title = "Lattice dynamics" ]
/*[ name() = "book:subTitle" and position() = 1 ]

# rats
/book:bookResource[1]
 /book:book[1]
 /*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate =
"2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
 /*[ name() = "book:title" and position() = 1 and @title = "Lattice dynamics" ]
 /book:subTitle[1]



# "content"
    Book 17

------
/book:bookResource/book:book/book:meta/book:isbn[1]

# posy
/book:bookResource[1]/book:book[1]/book:meta[1]/book:isbn[1]

# star
/*[ name() = "book:bookResource" and position() = 1 ]
/*[ name() = "book:book" and position() = 1 ]
/*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate = "
2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
/*[ name() = "book:isbn" and position() = 1 and @isbn = "979-0-4444-1000-17" and @type = "epub" ]

# rats
/book:bookResource[1]
 /book:book[1]
 /*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate =
"2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
 /*[ name() = "book:isbn" and position() = 1 and @isbn = "979-0-4444-1000-17" and @type = "epub" ]



# "content"


------
/book:bookResource/book:book/book:meta/book:isbn[2]

# posy
/book:bookResource[1]/book:book[1]/book:meta[1]/book:isbn[2]

# star
/*[ name() = "book:bookResource" and position() = 1 ]
/*[ name() = "book:book" and position() = 1 ]
/*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate = "
2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
/*[ name() = "book:isbn" and position() = 2 and @isbn = "979-0-4444-2000-2" and @type = "ppub" ]

# rats
/book:bookResource[1]
 /book:book[1]
 /*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate =
"2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
 /*[ name() = "book:isbn" and position() = 2 and @isbn = "979-0-4444-2000-2" and @type = "ppub" ]



# "content"


------

$
$
$
$
$ perl xpather.pl ravi06.xml //*[@isbn]
/book:bookResource/book:book/book:meta/book:isbn[1]

# posy
/book:bookResource[1]/book:book[1]/book:meta[1]/book:isbn[1]

# star
/*[ name() = "book:bookResource" and position() = 1 ]
/*[ name() = "book:book" and position() = 1 ]
/*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate = "
2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
/*[ name() = "book:isbn" and position() = 1 and @isbn = "979-0-4444-1000-17" and @type = "epub" ]

# rats
/book:bookResource[1]
 /book:book[1]
 /*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate =
"2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
 /*[ name() = "book:isbn" and position() = 1 and @isbn = "979-0-4444-1000-17" and @type = "epub" ]



# "content"


------
/book:bookResource/book:book/book:meta/book:isbn[2]

# posy
/book:bookResource[1]/book:book[1]/book:meta[1]/book:isbn[2]

# star
/*[ name() = "book:bookResource" and position() = 1 ]
/*[ name() = "book:book" and position() = 1 ]
/*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate = "
2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
/*[ name() = "book:isbn" and position() = 2 and @isbn = "979-0-4444-2000-2" and @type = "ppub" ]

# rats
/book:bookResource[1]
 /book:book[1]
 /*[ name() = "book:meta" and position() = 1 and @coverImage = "/cover.gif" and @doi = "10.1088" and @publicationDate =
"2016-12-01" and @issn = "1111-222X" and @collectionId = "0001" ]
 /*[ name() = "book:isbn" and position() = 2 and @isbn = "979-0-4444-2000-2" and @type = "ppub" ]



# "content"


------

$
##</code><code>##

//*[ name() = "book:isbn" and @isbn and @type = "ppub" ]