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xquery version "3.1";

(:~ 
 : This modules handles the conversion of the Fontante-TEI/XML into TEISimple
 : for the edited text. The resulting TEISimple is the basis for the "Editerter
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 : Text" view on the website and the book and represent the latest layer of text.
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 : 
 : The resulting TEISimple orientates itself toward the so-called "SUB-Schema"
 : which is a subset for TEISimple that is recommended for future projects that
 : are held by the Göttingen State and University Library (SUB).
 : 
 : @author Michelle Rodzis
 : @version 0.1
 :)

module namespace fontane-simple="http://fontane-nb.dariah.eu/teisimple";
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declare namespace tei="http://www.tei-c.org/ns/1.0";
declare namespace test="http://exist-db.org/xquery/xqsuite";
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import module namespace config="http://textgrid.de/ns/SADE/config" at "../config/config.xqm";
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import module namespace console="http://exist-db.org/xquery/console";
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import module namespace functx = "http://www.functx.com";
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(:~ 
 : The main function initiates the transformation of a given notebook.
 : 
 : TODO: adapt to several input files?
 : 
 : :)
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declare function fontane-simple:main($file as xs:string) as xs:string? {
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  let $doc := 
    try {
      (doc("/db/sade-projects/textgrid/data/xml/data/" || $file))
    } catch * {
      (console:log("It was not possible to open the requested file " || $file))
    }
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    let $front-covers := $doc//tei:sourceDoc/tei:surface[contains(@n, "front_cover")]/*
    let $back-covers := $doc//tei:sourceDoc/tei:surface[contains(@n, "back_cover")]/*
    let $content := $doc//tei:sourceDoc/tei:surface[not(contains(@n, "cover") 
        and matches(@n, "spine"))]
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    let $tei := <TEI xmlns="http://www.tei-c.org/ns/1.0">
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        {$doc//tei:teiHeader}
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        <text>
            <front>{fontane-simple:transform($front-covers)}</front>
            <body>{fontane-simple:transform($content)}</body>
            <back>{fontane-simple:transform($back-covers)}</back>
        </text>
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      </TEI>
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    return xmldb:store("/db/apps/SADE/resources/xml/", "tei-simple.xml", $tei)
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};
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(:~ 
 : Recursivly iterates the passed nodes and converts them according to the 
 : requirements for the "Edierter Text". 
 : 
 : The requirements are part of the encoding documentation, c.f.
 : https://fontane-nb.dariah.eu/doku.html.
 : 
 : 
 : @author Michelle Rodzis
 : @param $nodes
 : @return $node()* a TEISimple element
 : 
 :)
declare function fontane-simple:transform($nodes as node()*) as node()* {
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    for $node in $nodes
      return
        typeswitch ($node)
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        case text() return
            local:prepare-text($node)
        
        case element(tei:lb) return
            if($node[@break = "keepHyphen"]) then
                ()
            else
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                local:keep-element($node)
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        case element(tei:g) return
            if($node[@ref = "#vds"]) then
                ()
            else if($node/@ref ="#rth" or $node/@ref ="#hb") then
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                local:keep-element($node)
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            else
                fontane-simple:transform($node/node())
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        case element(tei:del) return
            if($node/parent::tei:restore) then
                fontane-simple:transform($node/node())
            else if($node/descendant::tei:restore) then
                fontane-simple:transform($node/descendant::tei:restore)
            else
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                ()
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        case element(tei:restore) return
            if(count($node/child::*) = 1 and $node/child::tei:del
            and $node/ancestor::tei:del) then
                ()
            else
                fontane-simple:transform($node/node())
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        case element(tei:retrace) return
            if($node/@rend) then
                element tei:seg {
                    $node/@rend,
                    fontane-simple:transform($node/node())
                }
            else
                fontane-simple:transform($node/node())
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        case element(tei:add) return
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            if($node/@type = "edited_text" 
            or $node/child::tei:seg[@type = "multiphrase"]) then
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                local:keep-element($node)
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            else if($node/@cause ="catchword" or $node/@cause ="unclear") then
                ()
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            else if($node/@rend ="|") then
                fontane-simple:transform($node/node())
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            else if(not($node/@xml:id)) then
                fontane-simple:transform($node/node())
            else if(fontane-simple:is-transposed($node)) then
                let $corresp := //tei:metamark[matches(@target, $node/@xml:id)]
                return
                    (fontane-simple:transform($corresp/node()),
                    fontane-simple:transform($node/node()))
            else
                fontane-simple:transform($node/node())
                
        case element(tei:addSpan) return
            if($node/@type = "edited_text") then
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                local:keep-element($node)
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            else
                ()
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        case element(tei:fw) return
            ()
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        case element(tei:line) return
            if(count($node/*) = 1 and $node/child::tei:fw) then
                ()
            else if(not($node/@type = "item")) then
                fontane-simple:transform($node/node())
            else if($node/@type = "item" and not($node/@xml:id)) then
                element tei:item {
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                    fontane-simple:transform($node/node())
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                }
            else if($node/@type = "item" 
            and fontane-simple:is-transposed($node)) then
                ()
            else
                fontane-simple:transform($node/node())
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        case element(tei:handShift) return
            (: tei:handShift without @new denote the duct of the current 
            writer or a change of writing medium :)
            if($node/@new and (fontane-simple:is-hand-contemporary($node/@new) or
            $node/@new = "#Friedrich_Fontane") or not($node/@new))
                then
                    local:keep-element($node)
                else
                    ()
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(:                if($node/following-sibling::*[1][count(./*) = 1 :)
(:                    and child::tei:fw or child::tei:stamp]):)
(:                    then:)
(:                        ():)
(:                    else:)
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(:                        element tei:handShift {:)
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(:                            $node/@*:)
(:                        }:)
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        case element(tei:stamp) return
            ()
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        case element(tei:seg) return
            if(count($node/*) = 1 and 
            ($node/child::tei:stamp or $node/child::tei:metamark[@function = "caret"]))
                then
                    ()
            else if(matches($node/@style, "underline") 
            and not(matches($node/@style, "vertical-align"))) then
                fontane-simple:transform($node/node())
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            else if($node/@style) then
                element{QName("http://www.tei-c.org/ns/1.0", $node/name())}{
                    attribute rendition {$node/@style},
                    $node/(@* except @style),
                    fontane-simple:transform($node/node())
                }
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            else if($node/@type = "initials" or $node/@type = "monogram"
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            or $node/@type = "multiphrase")
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                then
                    local:keep-element($node)
            else if($node/@type = "auction_number" 
            or $node/@type = "cancel"
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            or $node/@type = "abort"
            or $node/@function ="unknown")
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                then
                    ()
            else
                fontane-simple:transform($node/node())
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        case element(tei:hi) return
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            local:keep-element($node)
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        case element(tei:anchor) return
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            local:keep-element($node)
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        case element(tei:surface) return 
            if(matches($node/@n, "cover"))
                then
                    (if(not($node/@n = "outer_front_cover"))
                        then
                            element tei:pb {
                                if($node/@n = "inner_front_cover" 
                                or $node/@n = "outer_back_cover")
                                    then
                                        attribute type {"flyleaf"} 
                                    else
                                        attribute type {"cover"}
                            }
                        else
                            (),
                    element tei:div {
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                        attribute type {$node/@n},
                        $node/((@* except @facs) except @n),
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                        fontane-simple:transform($node/node())
                    })
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            else if(matches($node/@n, "[0-9]{1,4}[rv]{1}")
            and not($node/@type = "fragment"))
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                then
                    (element tei:pb{
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                        attribute n {$node/@n}
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                    },
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                    if(local:has-valid-text($node))
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                        then
                            element tei:div{
                                attribute type {"page"},
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                                $node/((@* except @facs) except @n),
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                                fontane-simple:transform($node/node())
                            }
                        else
                            ())
            else if(matches($node/@n, "[0-9]{1,4}[rv]{1}")
            and $node/@type = "fragment")
                then
                    (element tei:pb{
                        attribute n {$node/@n}
                    }, 
                    (: if all descendant text nodes shoudln't be serialized, z.g. parent::fw or parent::stamp :)
                    if($node)
                        then
                            element tei:div{
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                                $node/((@* except @facs) except @n),
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                                fontane-simple:transform($node/node())
                            }
                        else
                            ())
            else if($node/@type = "label" and
                (contains($node/@subtype, "Fontane")
                or contains($node/@subtype, "Hersteller"))
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                )
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                then
                    element tei:div {
                        attribute type {"label"},
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                        fontane-simple:transform($node/node())
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                    }
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            else
                ()
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        case element(tei:gap) return
            local:keep-element($node)
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        case element(tei:metamark) return
            if($node/@function = "integrate" 
            or $node/@function = "authorial_note") then
                element tei:ab {
                    $node/@*
                }
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            else if($node/@function = "placeholder" 
            or $node/@function ="etc."
            or $node/@function ="caret"
            or $node/@function ="footnotes"
            or $node/@function ="ellipsis"
            or $node/@function = "paragraph") then
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                element tei:ab {
                    attribute type {$node/@function},
                    fontane-simple:transform($node/node())
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                }
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            else
                ()
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        (: TODO: check if correct :)
        case element(tei:surplus) return
            ()
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        case element(tei:zone) return
            if(matches($node/@style, "border-style:solid") 
            and not(matches($node/@style, "border-radius"))
            and not($node/@rend = "border-style:house")) then
                element tei:div {
                    attribute type {"frame"},
                    fontane-simple:transform($node/node())
                }
            else if(matches($node/@rend, "border-bottom-style:brace")) then
                (fontane-simple:transform($node/node()),
                element tei:ab {
                    attribute type {"bottom-brace"}
                })                    
            else if($node/@type = "cancel") then
                ()
            else if($node/@type = "marked_off") then
                element tei:seg {
                    $node/@type,
                    $node/@xml:id,
                    fontane-simple:transform($node/node())
                }
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            else if($node/@type = "highlighted") then
                if($node/child::tei:zone[@type = "highlighted"]) then
                    fontane-simple:transform($node/node())
                else
                    element tei:hi {
                        attribute type {"vertical-mark"},
                        fontane-simple:transform($node/node())
                    }
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            else if(not($node/@xml:id)) then
                fontane-simple:transform($node/node())
            else if($node/@xml:id and fontane-simple:is-transposed($node)) then
                ()
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            else
                fontane-simple:transform($node/node())
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        case element(tei:figure) return
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            if(count($node/child::*) = 1 and $node/child::tei:figDesc) then
                (: genealogy lines probably shouldn't be displayed, but I still have to 
                check that. in case they should be serialized, I leave the code :)
(:                if(matches($node/descendant::tei:ref, "Stammbaumverbindungslinie")) then:)
(:                    element tei:seg {:)
(:                        $node/@*,:)
(:                        fontane-simple:transform($node/node()):)
(:                    }:)
(:                else if(matches($node/descendant::tei:ref, "Schlusslinie")):)
                if(matches($node/descendant::tei:ref, "Schlusslinie"))
                    then
                        element tei:ab {
                            switch ($node/descendant::tei:ref)
                                case "horizontale einfache Schlusslinie" return 
                                    attribute type {"long-end-line"}                                    
                                case "Schlusslinie; horizontale Halbschleife von links oben nach rechts" return 
                                    attribute type {"long-end-line"}
                                case "horizontale einfache Schlusslinie (gewellt)" return 
                                    attribute type {"long-end-line-wavy"}
                                case "Schlusslinien; horizontale Schleife von links oben nach rechts unten" return 
                                    attribute type {"bottom-brace-short"}
                                default return 
                                    attribute type {"end-line"}  
                        }
                else if(matches($node/descendant::tei:ref, "Absatzlinie")
                (: in case of double paragraph lines the single lines are 
                encoded with "oberer" resp. "unterer Teil", but we only 
                serialize the encoding for the upper line :)
                and not(matches($node/descendant::tei:ref, "unterer Teil"))
                and not(matches($node/descendant::tei:figDesc, "unsicher"))) then
                    element tei:ab {
                        if(matches($node/descendant::tei:ref, "doppelt"))
                            then
                                attribute type {"short-paragraph-line-double"}
                            else
                                attribute type {"short-paragraph-line"}
                    }
                    else
                        ()
                else
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                    local:keep-element($node)
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        case element(tei:note) return
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            if($node/@type = "authorial" 
            and not($node/@subtype = "footnote")) then
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                ()
            else
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                local:keep-element($node)
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        case element(tei:figDesc) return
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            local:keep-element($node)
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        case element(tei:ref) return
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            local:keep-element($node)
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        case element(tei:space) return
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            local:keep-element($node)
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        case element(tei:choice) return
            local:keep-element($node)
            
        case element(tei:abbr) return
            local:keep-element($node)
            
        case element(tei:expan) return
            local:keep-element($node)
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        case element(tei:ptr) return
            let $target-id := substring-after($node/@target, "#")
            let $target := $node/ancestor::tei:TEI//*[matches(@xml:id, $target-id)]
            let $stripped-target := fontane-simple:strip-element($target)
            return fontane-simple:transform($stripped-target)
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        default return
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            fontane-simple:transform($node/node())
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};

(: TODO: adapt to general XML :)
declare function fontane-simple:is-hand-contemporary($hand as xs:string) as xs:boolean {
    let $hand := replace($hand, "#", "")
    let $file := doc("/db/sade-projects/textgrid/data/xml/data/16b00.xml")
    let $handNote := $file//tei:handNote[@xml:id = $hand]
    return 
        if($handNote/@script = "contemporary")
            then
                true()
            else
                false()
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};

declare function fontane-simple:is-transposed($node as node()) as xs:boolean {
    let $root := $node/ancestor::tei:TEI
    return
        if($root//tei:ptr[contains(@target, $node/@xml:id)]) then
            true()
        else
            false()
};

declare function fontane-simple:strip-element($node as node()) {
    element {$node/name()} {
        $node/@type,
        fontane-simple:transform($node/node())
    }
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};
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declare function local:prepare-text($node as text()) as text()? {
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    let $cleared-hyphen := 
        if(ends-with($node, "-") and not(local:keep-hyphen($node))) then
            text {functx:substring-before-last($node, "-")}
        else if(ends-with($node, "⸗") and not(local:keep-hyphen($node))) then
            text {functx:substring-before-last($node, "⸗")}
        else
            $node
    let $cleared-round-s := replace($cleared-hyphen, "ſ", "s")
    return text {$cleared-round-s}
};

declare function local:keep-hyphen($node as text()) as xs:boolean {
    if($node/parent::tei:line/following-sibling::*[1][self::tei:lb[@break = "keepHyphen"]])
        then
            true()
    else
        false()
};

declare function local:keep-element($node as node()) as node() {
    element {QName("http://www.tei-c.org/ns/1.0", $node/name())}{
        $node/@*,
        fontane-simple:transform($node/node())
    }
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};
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declare function local:has-valid-text($node as node()) as xs:boolean {
    (: TODO :)
    true()
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};