X sgml-queries-results-q1:

<result> { //report//para } </result>

 X sgml-queries-results-q2:

<result> { //intro/para } </result>

 X sgml-queries-results-q3:

<result> { for $c in //chapter where empty($c/intro) return $c/section/intro/para } </result>

 X sgml-queries-results-q4:

<result> { (((//chapter)[2]//section)[3]//para)[2] } </result>

 X sgml-queries-results-q5:

<result> { //para[@security = "c"] } </result>

 X sgml-queries-results-q6:

<result> { for $s in //section/@shorttitle return <stitle>{ $s }</stitle> } </result>

 X sgml-queries-results-q7:

<result> { for $i in //intro/para[1] return <first_letter>{ substring(string($i), 1, 1) }</first_letter> } </result>

 X sgml-queries-results-q8a:

<result> { //section[.//title[contains(., "is SGML")]] } </result>

 X sgml-queries-results-q8b:

<result> { //section[.//title/text()[contains(., "is SGML")]] } </result>

 X sgml-queries-results-q9:

<result> { for $id in //xref/@xrefid return //topic[@topicid = $id] } </result>

 X sgml-queries-results-q10:

<result> { let $x := //xref[@xrefid = "top4"], $t := //title[. << exactly-one($x)] return $t[last()] } </result>