Base units participating in multiple layout units are not included in the RST structure

[thiippal]

This issue arises when the base units are split between multiple layout units, for instance, in the case a sentence extends begins on one page and continues on another.

In the original XQuery script, this issue was resolved using the following code:

                  let $parent-link := for $b in $base-file//unit[@id = $leaf-xref]/../@id
                                    return tokenize($b, " ")

                  let $child-link := for $b in $base-file//unit[@id = $leaf-xref]/@id
                                    return tokenize($b, " ")

                  let $rst-segs := for $se in $rst-segments/*[@id = $segment-ids and (@xref = $child-link or @xref = $parent-link)]/@id
                                   return tokenize($se, " ")

[thiippal]

Added a work-around, which unfortunately results in two edges drawn between the nodes.

[thiippal]

This issue was solved by adding a dictonary to track the drawn relations.