# posy
/root[1]/part[1]/sect[1]/header[1]

# star
/*[ name() = "root" and position() = 1 ]
/*[ name() = "part" and position() = 1 ]
/*[ name() = "sect" and position() = 1 ]
/*[ name() = "header" and position() = 1 ]

# "content"
     This is a design XZY document for Project 

##</code><code>##

//*[
  (
    name() = "para"
    or name() = "header"
  ) and (
    not(descendant::*)
  ) and (
    contains(
      translate(
        .,
        "DESIGN",
        "design",
      ),
      "design"
    )
  )
]