Based on https://libertyseeds.ca/2015/07/21/Investigating-Final-Draft-s-XML-document-format-with-Ruby

Final Draft.xq

(: https://libertyseeds.ca/2015/07/21/Investigating-Final-Draft-s-XML-document-format-with-Ruby/ :)
declare function local:update($result as map(*),$next as element()) as map(*)
{
 let $name:=name($next)
 let $current:=$result($name)
 let $atribs:=$next/@*[if(empty($current)) then true() else not( .=$current(name(.)))] 
 let $atribs:=map:merge(($current, $atribs!map:entry(name(.),string(.))), map{'duplicates': 'combine'})    
 return map:put($result,$name,$atribs)
};

doc("http://fountain.io/_downloads/Big%20Fish.fdx")//* 
=> fold-left(map{},local:update#2)

result

map {
  "SceneIntro": map {
  },
  "SceneBreaks": map {
    "ContinuedNumber": "No",
    "SceneTop": "CONTINUED:",
    "SceneTopOfNext": "No",
    "SceneBottom": "(CONTINUED)",
    "SceneBottomOfPage": "No"
  },
  "WindowState": map {
    "Mode": "Normal",
    "Width": "1126",
    "Left": "222",
    "Height": "800",
    "Top": "44"
  },
  "SmartType": map {
  },
  "ScriptNoteDefinitions": map {
    "Active": "0"
  },
  "SpellCheckIgnoreLists": map {
  },
  "TextState": map {
    "ShowInvisibles": "No",
    "Scaling": "100",
    "Selection": ("87624,87783", "106,106")
  },
  "HeaderAndFooter": map {
    "FooterFirstPage": "Yes",
    "HeaderVisible": ("Yes", "No"),
    "StartingPage": "1",
    "HeaderFirstPage": "No",
    "FooterVisible": "No"
  },
  "TitlePage": map {
  },
  "Macros": map {
  },
  "IgnoredRanges": map {
  },
  "SceneNumberOptions": map {
    "ShowNumbersOnRight": "Yes",
    "RightLocation": "7.25",
    "ShowNumbersOnLeft": "Yes",
    "LeftLocation": "0.75"
  },
  "ParagraphSpec": map {
    "Spacing": ("2", "1"),
    "Alignment": ("Left", "Right"),
    "SpaceBefore": ("0", "12"),
    "Leading": "Regular",
    "RightIndent": ("7.75", "7.50", "6.25", "5.75"),
    "LeftIndent": ("1.50", "3.38", "2.88", "2.38", "4.38"),
    "FirstIndent": ("0.00", "-0.10"),
    "StartsNewPage": "No"
  },
  "Character": map {
  },
  "Narrator": map {
    "Actor": "Man 1"
  },
  "FontSpec": map {
    "Size": ("12", "10", "9"),
    "Color": "#000000000000",
    "AdornmentStyle": "0",
    "Background": "#FFFFFFFFFFFF",
    "Font": ("Courier", "Courier Final Draft", "Arial", "Verdana"),
    "Style": ("", "AllCaps", "Italic"),
    "RevisionID": "0"
  },
  "Characters": map {
  },
  "Word": map {
  },
  "FinalDraft": map {
    "DocumentType": "Script",
    "Version": "1",
    "Template": "No"
  },
  "DialogueBreaks": map {
    "DialogueBottom": "(MORE)",
    "BottomOfPage": "Yes",
    "AutomaticCharacterContinueds": "No",
    "DialogueTop": "(cont'd)",
    "TopOfNext": "Yes"
  },
  "AutoCastList": map {
    "AutomaticallyGenerate": "Yes",
    "AddParentheses": "Yes",
    "CastListElement": "Cast List"
  },
  "Macro": map {
    "Shortcut": ("Ctrl+Alt+1", "Ctrl+Alt+2", "Ctrl+Alt+3", "Ctrl+Alt+4", "Ctrl+Alt+5", "Ctrl+Alt+6", "Ctrl+Alt+7", "Ctrl+Alt+8", "Ctrl+Alt+9", "Ctrl+Alt+0", "Ctrl+Shift+Alt+1", "Ctrl+Shift+Alt+2", "Ctrl+Shift+Alt+3", "Ctrl+Shift+Alt+4", "Ctrl+Shift+Alt+5", "Ctrl+Shift+Alt+6", "Ctrl+Shift+Alt+7", "Ctrl+Shift+Alt+8", "Ctrl+Shift+Alt+9", "Ctrl+Shift+Alt+0"),
    "Name": ("INT", "EXT", "I/E", "DAY", "NIGHT", "SUNRISE", "MAGIC", "CONT", "INTER", "", "CUTTO", "FADEIN", "FADEOUT", "FADETO", "DISSLV", "BACKTO", "MATCHCUT", "JUMPCUT", "FBLACK"),
    "Text": ("INT. ", "EXT. ", "I/E. ", " - DAY", " - NIGHT", " - SUNRISE", " - MAGIC", " (cont'd)", "interrupting", "", "CUT TO:", "FADE IN:", "FADE OUT.", "FADE TO:", "DISSOLVE TO:", "BACK TO:", "MATCH CUT TO:", "JUMP CUT TO:", "FADE TO BLACK."),
    "Transition": ("None", "Action", "Dialogue", "Scene Heading"),
    "Element": ("Scene Heading", "Character", "Parenthetical", "None", "Transition")
  },
  "Text": map {
    "Size": ("12", "36"),
    "Color": "#000000000000",
    "AdornmentStyle": ("0", "-1"),
    "Background": "#FFFFFFFFFFFF",
    "Font": ("Courier", "Capitals", "Courier Final Draft"),
    "Style": ("Bold", "", "Underline", "AllCaps", "Italic", "Bold+Underline"),
    "RevisionID": "0"
  },
  "Header": map {
  },
  "Paragraph": map {
    "Spacing": ("1", "2"),
    "Alignment": ("Center", "Right", "Left"),
    "SpaceBefore": ("12", "0"),
    "Leading": "Regular",
    "RightIndent": ("7.50", "7.75", "-1.10", "-1.25"),
    "Number": ("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "100", "101", "102", "103", "104", "105", "106", "107", "108", "109", "110", "111", "112", "113", "114", "115", "116", "117", "118", "119", "120", "121", "122", "123", "124", "125", "126", "127", "128", "129", "130", "131", "132", "133", "134", "135", "136", "137", "138", "139", "140", "141", "142", "143", "144", "145", "146", "147", "148", "149", "150", "151", "152", "153", "154", "155", "156", "157", "158", "159", "160", "161", "162", "163", "164", "165", "166", "167", "168", "169", "170", "171", "172", "173", "174", "175", "176", "177", "178", "179", "180", "181", "182", "183", "184", "185", "186", "187", "188", "189", "190", "191", "192", "193", "194", "195", "196", "197", "198", "199", "200", "201", "202"),
    "LeftIndent": ("1.50", "1.25", "1.00"),
    "Type": ("General", "Scene Heading", "Action", "Character", "Dialogue", "Parenthetical", "Transition"),
    "FirstIndent": "0.00",
    "StartsNewPage": "No"
  },
  "MoresAndContinueds": map {
  },
  "ScriptNoteDefinition": map {
    "Color": "#000000000000",
    "Name": ("Important", "Info Only", "Suggestion"),
    "Marker": ("1", "2", "3"),
    "ID": ("0", "65538", "2")
  },
  "Alias": map {
    "Confirm": "No",
    "SmartReplace": "No",
    "Text": "",
    "MatchCase": "No",
    "WordOnly": "No"
  },
  "Behavior": map {
    "Shortcut": ("0", "F1", "F2", "F3", "F4", "F5", "F6", "7", "8", "1"),
    "PaginateAs": ("General", "Scene Heading", "Action", "Character", "Parenthetical", "Dialogue", "Transition", "Singing"),
    "ReturnKey": ("General", "Action", "Dialogue", "Scene Heading")
  },
  "SceneIntros": map {
    "Separator": ". "
  },
  "Extensions": map {
  },
  "Transition": map {
  },
  "Actor": map {
    "Pitch": ("High", "Normal", "Low"),
    "MacVoice": ("mtk3", "gala"),
    "Speed": ("Medium", "Slow"),
    "Name": ("Man 1", "Man 2", "Woman 1", "Woman 2", "Boy 1", "Boy 2", "Girl 1", "Girl 2", "Old Man", "Old Woman"),
    "WinVoice": ("`Q|«g(–Ñ{DEST", "`]√≈D⁄—±Ò", "pQ|«g(–Ñ{DEST", "‘ëPO|u—è˙")
  },
  "DynamicLabel": map {
    "Type": "Page #"
  },
  "Location": map {
  },
  "IgnoredWords": map {
  },
  "SplitState": map {
    "SplitterPosition": "0",
    "SplitMode": "None",
    "ActivePanel": "1"
  },
  "ActivateIn": map {
    "Element": ("General", "Scene Heading", "Action", "Character", "Parenthetical", "Dialogue", "Transition", "Singing")
  },
  "TimeOfDay": map {
  },
  "Revisions": map {
    "ShowAllMarks": "No",
    "ShowAllSets": "No",
    "Location": "8.00",
    "RevisionsShown": "Active",
    "ActiveSet": "1",
    "RevisionMode": "No"
  },
  "Content": map {
  },
  "PageLayout": map {
    "ForegroundColor": "#000000000000",
    "TopMargin": "72",
    "BreakDialogueAndActionAtSentences": "Yes",
    "FooterMargin": "36",
    "DocumentLeading": "Normal",
    "UsesSmartQuotes": "Yes",
    "BackgroundColor": "#FFFFFFFFFFFF",
    "BottomMargin": "72",
    "HeaderMargin": "36",
    "InvisiblesColor": "#888888888888"
  },
  "ScriptPanel": map {
    "DisplayMode": "Page"
  },
  "LockedPages": map {
  },
  "Member": map {
    "Character": ("a man’s voice", "amos", "beamen", "don price", "DR. BENNETT", "EDWARD", "FADE IN", "FLASHCUT TO:", "hippo", "JENNY", "jiing", "jing", "JING]", "JOSEPHINE", "JUMP LEADER", "KARL", "kid", "man", "man’s voice", "minister", "norther", "nurse", "ping", "pint", "PROFESSOR", "SANDRA", "Son", "The crowd", "will", "wilbur freely", "zacky", "sandy", "boy", "zacky price", "jerry", "CUT TO:", "mayor", "norther winslow", "Mr. Soggybottom", "sandra and josephine", "sam", "candystriper", "WARNING!  JUMPING SPIDERS.", "OFFICER", "WARNING!  JUMPING SPIDERS!", "the man", "woman’s voice", "another woman’s voice", "AMos CALLOWAY", "don", "cashier girl", "greeley", "gl", "older edward", "YOUNG WILL", "principal", "Angry girl’s father", "helpful woman", "BLONDE", "Sn", "VARIOUS TOWNFOLK", "Jeny", "Mildred", "mother", "husband", "young dr. bennett"),
    "Actor": "Man 1"
  },
  "Footer": map {
  },
  "Revision": map {
    "Color": ("#25FF00009FFF", "#06D80A6D9144", "#0376646C0490", "#8D6786FF0345"),
    "FullRevision": "No",
    "Name": ("Red", "Blue", "Green", "Yellow"),
    "Mark": "*",
    "Style": "",
    "ID": ("1", "2", "3", "4")
  },
  "Element": map {
    "Type": ("Character", "Dialogue")
  },
  "Actors": map {
  },
  "Transitions": map {
  },
  "Locations": map {
  },
  "Extension": map {
  },
  "TimesOfDay": map {
    "Separator": " - "
  },
  "SceneProperties": map {
    "Length": ("5/8", "3/8", "1", "1 4/8", "1 2/8", "1/8", "2/8", "7/8", "4/8", "1 3/8", "1 6/8", "3 5/8", "6/8", "3 4/8", "3 6/8", "1 5/8", "2 4/8", "1 1/8", "2", "1 7/8", "3"),
    "Page": ("1", "2", "3", "4", "6", "7", "8", "10", "11", "12", "14", "15", "16", "18", "19", "20", "23", "24", "25", "26", "27", "28", "31", "32", "33", "34", "35", "37", "38", "39", "40", "41", "43", "44", "46", "47", "48", "52", "54", "55", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "74", "75", "76", "77", "78", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "94", "95", "96", "97", "99", "100", "101", "102", "103", "104", "105", "106", "107", "108", "110", "112", "113", "114", "115", "117", "118", "119", "120"),
    "Title": ""
  },
  "ElementSettings": map {
    "Type": ("General", "Scene Heading", "Action", "Character", "Parenthetical", "Dialogue", "Transition", "Shot", "Cast List", "Singing")
  },
  "Cast": map {
  }
}