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><H1
><A
NAME="EXPAND-CHILDREN"
></A
>expand-children</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN968"
></A
><H2
>Name</H2
>expand-children -- Expand selected nodes in a node list</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN971"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>(expand-children nodelist gilist)</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN974"
></A
><H2
>Description</H2
><P
>Given a node-list, <TT
CLASS="LITERAL"
>expand-children</TT
> replaces all of the members
of the node-list whose GIs are members of <TT
CLASS="LITERAL"
>gilist</TT
> with
<TT
CLASS="LITERAL"
>(children)</TT
>.</P
><P
>This function can be used to selectively
flatten the hierarchy of a document.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN981"
></A
><H2
>Example</H2
><P
>Suppose that the node list is <TT
CLASS="LITERAL"
>(BOOKINFO PREFACE PART APPENDIX)</TT
>.
<TT
CLASS="LITERAL"
>(expand-children nl ("PART"))</TT
> might return
<TT
CLASS="LITERAL"
>(BOOKINFO PREFACE CHAPTER CHAPTER APPENDIX)</TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN987"
></A
><H2
>Author</H2
><P
>Norman Walsh, <ndw@nwalsh.com></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN990"
></A
><H2
>Source Code</H2
><PRE
CLASS="PROGRAMLISTING"
>(define (expand-children nodelist gilist)
;; Expand selected nodes in a node list
(let loop ((nl nodelist) (result (empty-node-list)))
(if (node-list-empty? nl)
result
(if (member (gi (node-list-first nl)) gilist)
(loop (node-list-rest nl)
(node-list result (children (node-list-first nl))))
(loop (node-list-rest nl)
(node-list result (node-list-first nl)))))))</PRE
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