Improve writing metadata for docx, pptx and odt (#5252)

* docx writer: support custom properties.  Solves the writer part of #3024.
  Also supports additional core properties:  `subject`, `lang`, `category`,
  `description`.

* odt writer: improve standard properties, including the following core properties:
  `generator` (Pandoc/VERSION), `description`, `subject`, `keywords`,
  `initial-creator` (from authors), `creation-date` (actual creation date).
  Also fix date.

* pptx writer: support custom properties.  Also supports additional core
  properties: `subject`, `category`, `description`.

* Includes golden tests.

* MANUAL: document metadata support for docx, odt, pptx writers

MANUAL.txt

@@ -1355,7 +1355,7 @@ directory (see `--data-dir`, above). *Exceptions:*
   (or the `default.context` template, if you use `-t context`,
   or the `default.ms` template, if you use `-t ms`, or the
   `default.html` template, if you use `-t html`).
-- `docx` has no template (however, you can use
+- `docx` and `pptx` have no template (however, you can use
   `--reference-doc` to customize the output).
 
 Templates contain *variables*, which allow for the inclusion of
@@ -1363,7 +1363,7 @@ arbitrary information at any point in the file. They may be set at the
 command line using the `-V/--variable` option. If a variable is not set,
 pandoc will look for the key in the document's metadata – which can be set
 using either [YAML metadata blocks][Extension: `yaml_metadata_block`]
-or with the `--metadata` option.
+or with the `-M/--metadata` option.
 
 Metadata variables
 ------------------
@@ -1381,14 +1381,48 @@ Metadata variables
         ...
 
 `subtitle`
-:   document subtitle, included in HTML, EPUB, LaTeX, ConTeXt, and Word docx
+:   document subtitle, included in HTML, EPUB, LaTeX, ConTeXt, and docx
+    documents
 
 `abstract`
-:   document summary, included in LaTeX, ConTeXt, AsciiDoc, and Word docx
+:   document summary, included in LaTeX, ConTeXt, AsciiDoc, and docx
+    documents
 
 `keywords`
-:   list of keywords to be included in HTML, PDF, and AsciiDoc metadata;
-    repeat as for `author`, above
+:   list of keywords to be included in HTML, PDF, ODT, pptx, docx
+    and AsciiDoc metadata; repeat as for `author`, above
+
+`subject`
+:   document subject, included in ODT, docx and pptx metadata
+
+`description`
+:   document description, included in ODT, docx and pptx metadata. Some
+    applications show this as `Comments` metadata.
+
+`category`
+:   document category, included in docx and pptx metadata
+
+Additionally,
+any root-level string metadata, not included in ODT, docx
+or pptx metadata is added as a *custom property*.
+The following YAML metadata block for instance:
+
+    ---
+    title:  'This is the title'
+    subtitle: "This is the subtitle"
+    author:
+    - Author One
+    - Author Two
+    description: |
+        This is a long
+        description.
+
+        It consists of two paragraphs
+    ...
+
+will include `title`, `author` and `description` as standard document
+properties and `subtitle` as a custom property when converting to docx,
+ODT or pptx.
 
 Language variables
 ------------------

src/Text/Pandoc/Writers/Docx.hs

@@ -496,7 +496,17 @@ writeDocx opts doc@(Pandoc meta _) = do
                        Just (MetaList xs) -> map stringify xs
                        _                  -> []
 
+  -- docProps/core.xml
   let docPropsPath = "docProps/core.xml"
+  let extraCoreProps = ["subject","lang","category","description"]
+  let extraCorePropsMap = M.fromList $ zip extraCoreProps
+                       ["dc:subject","dc:language","cp:category","dc:description"]
+  let lookupMetaString' :: String -> Meta -> String
+      lookupMetaString' key' meta' =
+        case key' of
+             "description"    -> intercalate "_x000d_\n" (map stringify $ lookupMetaBlocks "description" meta')
+             _                -> lookupMetaString key' meta'
+  
   let docProps = mknode "cp:coreProperties"
           [("xmlns:cp","http://schemas.openxmlformats.org/package/2006/metadata/core-properties")
           ,("xmlns:dc","http://purl.org/dc/elements/1.1/")
@@ -505,14 +515,19 @@ writeDocx opts doc@(Pandoc meta _) = do
           ,("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance")]
           $ mknode "dc:title" [] (stringify $ docTitle meta)
           : mknode "dc:creator" [] (intercalate "; " (map stringify $ docAuthors meta))
-          : mknode "cp:keywords" [] (intercalate ", " keywords)
+          : [ mknode (M.findWithDefault "" k extraCorePropsMap) [] (lookupMetaString' k meta)
+            | k <- M.keys (unMeta meta), k `elem` extraCoreProps]
+          ++ mknode "cp:keywords" [] (intercalate ", " keywords)
           : (\x -> [ mknode "dcterms:created" [("xsi:type","dcterms:W3CDTF")] x
                    , mknode "dcterms:modified" [("xsi:type","dcterms:W3CDTF")] x
                    ]) (formatTime defaultTimeLocale "%FT%XZ" utctime)
   let docPropsEntry = toEntry docPropsPath epochtime $ renderXml docProps
 
+  -- docProps/custom.xml
   let customProperties :: [(String, String)]
-      customProperties = [] -- FIXME
+      customProperties = [(k, lookupMetaString k meta) | k <- M.keys (unMeta meta)
+                         , k `notElem` (["title", "author", "keywords"]
+                                       ++ extraCoreProps)]
   let mkCustomProp (k, v) pid = mknode "property"
          [("fmtid","{D5CDD505-2E9C-101B-9397-08002B2CF9AE}")
          ,("pid", show pid)

src/Text/Pandoc/Writers/ODT.hs

@@ -40,6 +40,7 @@ import Data.List (isPrefixOf, intercalate)
 import Data.Maybe (fromMaybe)
 import qualified Data.Map as Map
 import qualified Data.Text.Lazy as TL
+import Data.Time
 import System.FilePath (takeDirectory, takeExtension, (<.>))
 import Text.Pandoc.BCP47 (Lang (..), getLang, renderLang)
 import Text.Pandoc.Class (PandocMonad, report, toLang)
@@ -50,8 +51,9 @@ import Text.Pandoc.Logging
 import Text.Pandoc.MIME (extensionFromMimeType, getMimeType)
 import Text.Pandoc.Options (WrapOption (..), WriterOptions (..))
 import Text.Pandoc.Pretty
-import Text.Pandoc.Shared (stringify, normalizeDate)
-import Text.Pandoc.Writers.Shared (lookupMetaString, fixDisplayMath)
+import Text.Pandoc.Shared (stringify, pandocVersion)
+import Text.Pandoc.Writers.Shared (lookupMetaString, lookupMetaBlocks,
+                                   fixDisplayMath)
 import Text.Pandoc.UTF8 (fromStringLazy, fromTextLazy, toStringLazy)
 import Text.Pandoc.Walk
 import Text.Pandoc.Writers.OpenDocument (writeOpenDocument)
@@ -83,6 +85,7 @@ pandocToODT :: PandocMonad m
 pandocToODT opts doc@(Pandoc meta _) = do
   let title = docTitle meta
   let authors = docAuthors meta
+  utctime <- P.getCurrentTime
   lang <- toLang (getLang opts meta)
   refArchive <-
        case writerReferenceDoc opts of
@@ -125,9 +128,14 @@ pandocToODT opts doc@(Pandoc meta _) = do
               )
          )
   let archive' = addEntryToArchive manifestEntry archive
+  -- create meta.xml
   let userDefinedMetaFields = [k | k <- Map.keys (unMeta meta)
-                              , k `notElem` ["title", "lang", "author", "date"]]
+                              , k `notElem` ["title", "lang", "author"
+                                           , "description", "subject", "keywords"]]
   let escapedText = text . escapeStringForXML
+  let keywords = case lookupMeta "keywords" meta of
+                      Just (MetaList xs) -> map stringify xs
+                      _                  -> []
   let userDefinedMeta =
         map (\k -> inTags False "meta:user-defined"
               [ ("meta:name", escapeStringForXML k)
@@ -146,19 +154,29 @@ pandocToODT opts doc@(Pandoc meta _) = do
            ,("xmlns:ooo","http://openoffice.org/2004/office")
            ,("xmlns:grddl","http://www.w3.org/2003/g/data-view#")
            ,("office:version","1.2")] ( inTags True "office:meta" [] $
-                 ( metaTag "dc:title" (stringify title)
+                 ( metaTag "meta:generator" ("Pandoc/" ++ pandocVersion)
+                   $$
+                   metaTag "dc:title" (stringify title)
+                   $$
+                   metaTag "dc:description"
+                          (intercalate "\n" (map stringify $
+                                         lookupMetaBlocks "description" meta))
+                   $$
+                   metaTag "dc:subject" (lookupMetaString "subject" meta)
+                   $$
+                   metaTag "meta:keyword" (intercalate ", " keywords)
                    $$
                    case lang of
                         Just l  -> metaTag "dc:language" (renderLang l)
                         Nothing -> empty
                    $$
-                   metaTag "dc:creator"
+                   (\d a -> metaTag "meta:initial-creator" a
+                         $$ metaTag "dc:creator" a
+                         $$ metaTag "meta:creation-date" d
+                         $$ metaTag "dc:date" d
+                   ) (formatTime defaultTimeLocale "%FT%XZ" utctime)
                      (intercalate "; " (map stringify authors))
                    $$
-                   maybe mempty
-                     (metaTag "dc:date")
-                       (normalizeDate (lookupMetaString "date" meta))
-                   $$
                    vcat userDefinedMeta
                  )
              )

src/Text/Pandoc/Writers/Powerpoint/Output.hs

@@ -58,7 +58,7 @@ import Text.Pandoc.MIME
 import qualified Data.ByteString.Lazy as BL
 import Text.Pandoc.Writers.OOXML
 import qualified Data.Map as M
-import Data.Maybe (mapMaybe, listToMaybe, fromMaybe, maybeToList, catMaybes)
+import Data.Maybe (mapMaybe, listToMaybe, fromMaybe, maybeToList, catMaybes, isNothing)
 import Text.Pandoc.ImageSize
 import Control.Applicative ((<|>))
 import System.FilePath.Glob
@@ -252,6 +252,8 @@ presentationToArchiveP p@(Presentation docProps slides) = do
   newArch' <- foldM copyFileToArchive emptyArchive filePaths
   -- we make a docProps/core.xml entry out of the presentation docprops
   docPropsEntry <- docPropsToEntry docProps
+  -- we make a docProps/custom.xml entry out of the custom properties
+  docCustomPropsEntry <- docCustomPropsToEntry docProps
   -- we make this ourself in case there's something unexpected in the
   -- one in the reference doc.
   relsEntry <- topLevelRelsEntry
@@ -274,7 +276,8 @@ presentationToArchiveP p@(Presentation docProps slides) = do
     spkNotesEntries ++
     spkNotesRelEntries ++
     mediaEntries ++
-    [contentTypesEntry, docPropsEntry, relsEntry, presEntry, presRelsEntry]
+    [contentTypesEntry, docPropsEntry, docCustomPropsEntry, relsEntry,
+     presEntry, presRelsEntry]
 
 makeSlideIdMap :: Presentation -> M.Map SlideId Int
 makeSlideIdMap (Presentation _ slides) =
@@ -1425,6 +1428,10 @@ topLevelRels =
                  , relType = "http://schemas.openxmlformats.org/package/2006/relationships/metadata/extended-properties"
                  , relTarget = "docProps/app.xml"
                  }
+  , Relationship { relId = 4
+                 , relType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/custom-properties"
+                 , relTarget = "docProps/custom.xml"
+                 }
   ]
 
 topLevelRelsEntry :: PandocMonad m => P m Entry
@@ -1657,7 +1664,7 @@ docPropsElement :: PandocMonad m => DocProps -> P m Element
 docPropsElement docProps = do
   utctime <- asks envUTCTime
   let keywords = case dcKeywords docProps of
-        Just xs -> intercalate "," xs
+        Just xs -> intercalate ", " xs
         Nothing -> ""
   return $
     mknode "cp:coreProperties"
@@ -1669,7 +1676,13 @@ docPropsElement docProps = do
     $ (mknode "dc:title" [] $ fromMaybe "" $ dcTitle docProps)
     : (mknode "dc:creator" [] $ fromMaybe "" $ dcCreator docProps)
     : (mknode "cp:keywords" [] keywords)
-    : (\x -> [ mknode "dcterms:created" [("xsi:type","dcterms:W3CDTF")] x
+    : (if isNothing (dcSubject docProps) then [] else
+           [mknode "dc:subject" [] $ fromMaybe "" $ dcSubject docProps])
+    ++ (if isNothing (dcDescription docProps) then [] else
+           [mknode "dc:description" [] $ fromMaybe "" $ dcDescription docProps])
+    ++ (if isNothing (cpCategory docProps) then [] else
+           [mknode "cp:category" [] $ fromMaybe "" $ cpCategory docProps])
+    ++ (\x -> [ mknode "dcterms:created" [("xsi:type","dcterms:W3CDTF")] x
              , mknode "dcterms:modified" [("xsi:type","dcterms:W3CDTF")] x
              ]) (formatTime defaultTimeLocale "%FT%XZ" utctime)
 
@@ -1677,6 +1690,21 @@ docPropsToEntry :: PandocMonad m => DocProps -> P m Entry
 docPropsToEntry docProps = docPropsElement docProps >>=
                            elemToEntry "docProps/core.xml"
 
+-- adapted from the Docx writer
+docCustomPropsElement :: PandocMonad m => DocProps -> P m Element
+docCustomPropsElement docProps = do
+  let mkCustomProp (k, v) pid = mknode "property"
+         [("fmtid","{D5CDD505-2E9C-101B-9397-08002B2CF9AE}")
+         ,("pid", show pid)
+         ,("name", k)] $ mknode "vt:lpwstr" [] v
+  return $ mknode "Properties"
+          [("xmlns","http://schemas.openxmlformats.org/officeDocument/2006/custom-properties")
+          ,("xmlns:vt","http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes")
+          ] $ zipWith mkCustomProp (fromMaybe [] $ customProperties docProps) [(2 :: Int)..]
+
+docCustomPropsToEntry :: PandocMonad m => DocProps -> P m Entry
+docCustomPropsToEntry docProps = docCustomPropsElement docProps >>=
+                           elemToEntry "docProps/custom.xml"
 
 defaultContentTypeToElem :: DefaultContentType -> Element
 defaultContentTypeToElem dct =
@@ -1765,6 +1793,7 @@ presentationToContentTypes p@(Presentation _ slides) = do
 
       inheritedOverrides = mapMaybe pathToOverride filePaths
       docPropsOverride = mapMaybe pathToOverride ["docProps/core.xml"]
+      docCustomPropsOverride = mapMaybe pathToOverride ["docProps/custom.xml"]
       presOverride = mapMaybe pathToOverride ["ppt/presentation.xml"]
   relativePaths <- mapM slideToFilePath slides
   let slideOverrides = mapMaybe
@@ -1773,7 +1802,8 @@ presentationToContentTypes p@(Presentation _ slides) = do
   speakerNotesOverrides <- (mapMaybe pathToOverride) <$> getSpeakerNotesFilePaths
   return $ ContentTypes
     (defaults ++ mediaDefaults)
-    (inheritedOverrides ++ docPropsOverride ++ presOverride ++ slideOverrides ++ speakerNotesOverrides)
+    (inheritedOverrides ++ docPropsOverride ++ docCustomPropsOverride ++
+     presOverride ++ slideOverrides ++ speakerNotesOverrides)
 
 presML :: String
 presML = "application/vnd.openxmlformats-officedocument.presentationml"
@@ -1788,6 +1818,7 @@ getContentType fp
   | fp == "ppt/viewProps.xml" = Just $ presML ++ ".viewProps+xml"
   | fp == "ppt/tableStyles.xml" = Just $ presML ++ ".tableStyles+xml"
   | fp == "docProps/core.xml" = Just $ "application/vnd.openxmlformats-package.core-properties+xml"
+  | fp == "docProps/custom.xml" = Just $ "application/vnd.openxmlformats-officedocument.custom-properties+xml"
   | fp == "docProps/app.xml" = Just $ noPresML ++ ".extended-properties+xml"
   | "ppt" : "slideMasters" : f : [] <- splitDirectories fp
   , (_, ".xml") <- splitExtension f =

src/Text/Pandoc/Writers/Powerpoint/Presentation.hs

@@ -72,7 +72,8 @@ import Text.Pandoc.Logging
 import Text.Pandoc.Walk
 import Data.Time (UTCTime)
 import qualified Text.Pandoc.Shared as Shared -- so we don't overlap "Element"
-import Text.Pandoc.Writers.Shared (lookupMetaInlines, toTableOfContents)
+import Text.Pandoc.Writers.Shared (lookupMetaInlines, lookupMetaBlocks
+                                 , lookupMetaString, toTableOfContents)
 import qualified Data.Map as M
 import qualified Data.Set as S
 import Data.Maybe (maybeToList, fromMaybe)
@@ -180,7 +181,10 @@ data DocProps = DocProps { dcTitle :: Maybe String
                          , dcSubject :: Maybe String
                          , dcCreator :: Maybe String
                          , dcKeywords :: Maybe [String]
+                         , dcDescription :: Maybe String
+                         , cpCategory :: Maybe String
                          , dcCreated :: Maybe UTCTime
+                         , customProperties :: Maybe [(String, String)]
                          } deriving (Show, Eq)
 
 
@@ -930,13 +934,26 @@ metaToDocProps meta =
 
       authors = case map Shared.stringify $ docAuthors meta of
                   [] -> Nothing
-                  ss -> Just $ intercalate ";" ss
+                  ss -> Just $ intercalate "; " ss
+
+      description = case map Shared.stringify $ lookupMetaBlocks "description" meta of
+                  [] -> Nothing
+                  ss -> Just $ intercalate "_x000d_\n" ss
+
+      customProperties' = case [(k, lookupMetaString k meta) | k <- M.keys (unMeta meta)
+                               , k `notElem` (["title", "author", "keywords", "description"
+                                             , "subject","lang","category"])] of
+                  [] -> Nothing
+                  ss -> Just ss
   in
     DocProps{ dcTitle = Shared.stringify <$> lookupMeta "title" meta
             , dcSubject = Shared.stringify <$> lookupMeta "subject" meta
             , dcCreator = authors
             , dcKeywords = keywords
+            , dcDescription = description
+            , cpCategory = Shared.stringify <$> lookupMeta "category" meta
             , dcCreated = Nothing
+            , customProperties = customProperties'
             }
 
 documentToPresentation :: WriterOptions

test/Tests/Writers/Docx.hs

@@ -156,4 +156,14 @@ tests = [ testGroup "inlines"
             "docx/custom_style.native"
             "docx/golden/custom_style_reference.docx"
           ]
+        , testGroup "metadata"
+          [ docxTest "document properties (core, custom)"
+            def
+            "docx/document-properties.native"
+            "docx/golden/document-properties.docx"
+          , docxTest "document properties (short description)"
+            def
+            "docx/document-properties-short-desc.native"
+            "docx/golden/document-properties-short-desc.docx"
+          ]
         ]

test/Tests/Writers/Powerpoint.hs

@@ -99,4 +99,12 @@ tests = groupPptxTests [ pptxTests "Inline formatting"
                          def
                          "pptx/raw_ooxml.native"
                          "pptx/raw_ooxml.pptx"
+                       , pptxTests "metadata, custom properties"
+                         def
+                         "pptx/document-properties.native"
+                         "pptx/document-properties.pptx"
+                       , pptxTests "metadata, short description"
+                         def
+                         "pptx/document-properties-short-desc.native"
+                         "pptx/document-properties-short-desc.pptx"
                        ]

test/docx/document-properties-short-desc.native

@@ -0,0 +1,2 @@
+Pandoc (Meta {unMeta = fromList [("author",MetaList [MetaInlines [Str "A.",Space,Str "M."]]),("description",MetaInlines [Str "Short",Space,RawInline (Format "html") "<i>",Str "description",RawInline (Format "html") "</i>",Space,Str "&."]),("keywords",MetaList [MetaInlines [Str "keyword",Space,Str "1"],MetaInlines [Str "keyword",Space,Str "2"]]),("subject",MetaInlines [Str "This",Space,Str "is",Space,Str "the",Space,Str "subject"]),("title",MetaInlines [Str "Testing",Space,Str "custom",Space,Str "properties"])]})
+[Para [Str "Testing",Space,Str "document",Space,Str "properties"]]

test/docx/document-properties.native

@@ -0,0 +1,2 @@
+Pandoc (Meta {unMeta = fromList [("Company",MetaInlines [Str "My",Space,Str "Company"]),("Second Custom Property",MetaInlines [Str "Second",Space,Str "custom",Space,Str "property",Space,Str "value"]),("abstract",MetaBlocks [Plain [Str "Quite",Space,Str "a",Space,Str "long",Space,Str "description",SoftBreak,Str "spanning",Space,Str "several",Space,Str "lines"]]),("author",MetaList [MetaInlines [Str "A.",Space,Str "M."]]),("category",MetaInlines [Str "My",Space,Str "Category"]),("custom1",MetaInlines [Str "First",Space,Str "custom",Space,Str "property",Space,Str "value"]),("custom3",MetaInlines [Str "Escaping",Space,Str "amp",Space,Str "&",Space,Str "."]),("custom4",MetaInlines [Str "Escaping",Space,Str "LT,GT",Space,Str "<",Space,Str "asdf",Space,Str ">",Space,Str "<"]),("custom5",MetaInlines [Str "Escaping",Space,Str "html",Space,RawInline (Format "html") "<i>",Str "asdf",RawInline (Format "html") "</i>"]),("custom6",MetaInlines [Str "Escaping",Space,Emph [Str "MD"],Space,Str "\225",Space,Str "a"]),("custom9",MetaInlines [Str "Extended",Space,Str "chars:",Space,Str "\8364",Space,Str "\225",Space,Str "\233",Space,Str "\237",Space,Str "\243",Space,Str "\250",Space,Str "$"]),("description",MetaBlocks [Para [Str "Long",Space,Str "description",Space,Str "spanning",SoftBreak,Str "several",Space,Str "lines."],Plain [Str "This",Space,Str "is",Space,Str "\225",Space,Str "second",Space,RawInline (Format "html") "<i>",Str "line",RawInline (Format "html") "</i>",Str "."]]),("keywords",MetaList [MetaInlines [Str "keyword",Space,Str "1"],MetaInlines [Str "keyword",Space,Str "2"]]),("lang",MetaInlines [Str "en-US"]),("nested-custom",MetaList [MetaMap (fromList [("custom 7",MetaInlines [Str "Nested",Space,Str "Custom",Space,Str "value",Space,Str "7"])]),MetaMap (fromList [("custom 8",MetaInlines [Str "Nested",Space,Str "Custom",Space,Str "value",Space,Str "8"])])]),("subject",MetaInlines [Str "This",Space,Str "is",Space,Str "the",Space,Str "subject"]),("subtitle",MetaInlines [Str "This",Space,Str "is",Space,Str "a",Space,Str "subtitle"]),("title",MetaInlines [Str "Testing",Space,Str "custom",Space,Str "properties"])]})
+[Para [Str "Testing",Space,Str "document",Space,Str "properties"]]

test/pptx/document-properties-short-desc.native

@@ -0,0 +1,2 @@
+Pandoc (Meta {unMeta = fromList [("author",MetaList [MetaInlines [Str "A.",Space,Str "M."]]),("description",MetaInlines [Str "Short",Space,RawInline (Format "html") "<i>",Str "description",RawInline (Format "html") "</i>",Space,Str "&."]),("keywords",MetaList [MetaInlines [Str "keyword",Space,Str "1"],MetaInlines [Str "keyword",Space,Str "2"]]),("subject",MetaInlines [Str "This",Space,Str "is",Space,Str "the",Space,Str "subject"]),("title",MetaInlines [Str "Testing",Space,Str "custom",Space,Str "properties"])]})
+[Para [Str "Testing",Space,Str "document",Space,Str "properties"]]

test/pptx/document-properties.native

@@ -0,0 +1,2 @@
+Pandoc (Meta {unMeta = fromList [("Company",MetaInlines [Str "My",Space,Str "Company"]),("Second Custom Property",MetaInlines [Str "Second",Space,Str "custom",Space,Str "property",Space,Str "value"]),("abstract",MetaBlocks [Plain [Str "Quite",Space,Str "a",Space,Str "long",Space,Str "description",SoftBreak,Str "spanning",Space,Str "several",Space,Str "lines"]]),("author",MetaList [MetaInlines [Str "A.",Space,Str "M."]]),("category",MetaInlines [Str "My",Space,Str "Category"]),("custom1",MetaInlines [Str "First",Space,Str "custom",Space,Str "property",Space,Str "value"]),("custom3",MetaInlines [Str "Escaping",Space,Str "amp",Space,Str "&",Space,Str "."]),("custom4",MetaInlines [Str "Escaping",Space,Str "LT,GT",Space,Str "<",Space,Str "asdf",Space,Str ">",Space,Str "<"]),("custom5",MetaInlines [Str "Escaping",Space,Str "html",Space,RawInline (Format "html") "<i>",Str "asdf",RawInline (Format "html") "</i>"]),("custom6",MetaInlines [Str "Escaping",Space,Emph [Str "MD"],Space,Str "\225",Space,Str "a"]),("custom9",MetaInlines [Str "Extended",Space,Str "chars:",Space,Str "\8364",Space,Str "\225",Space,Str "\233",Space,Str "\237",Space,Str "\243",Space,Str "\250",Space,Str "$"]),("description",MetaBlocks [Para [Str "Long",Space,Str "description",Space,Str "spanning",SoftBreak,Str "several",Space,Str "lines."],Plain [Str "This",Space,Str "is",Space,Str "\225",Space,Str "second",Space,RawInline (Format "html") "<i>",Str "line",RawInline (Format "html") "</i>",Str "."]]),("keywords",MetaList [MetaInlines [Str "keyword",Space,Str "1"],MetaInlines [Str "keyword",Space,Str "2"]]),("lang",MetaInlines [Str "en-US"]),("nested-custom",MetaList [MetaMap (fromList [("custom 7",MetaInlines [Str "Nested",Space,Str "Custom",Space,Str "value",Space,Str "7"])]),MetaMap (fromList [("custom 8",MetaInlines [Str "Nested",Space,Str "Custom",Space,Str "value",Space,Str "8"])])]),("subject",MetaInlines [Str "This",Space,Str "is",Space,Str "the",Space,Str "subject"]),("subtitle",MetaInlines [Str "This",Space,Str "is",Space,Str "a",Space,Str "subtitle"]),("title",MetaInlines [Str "Testing",Space,Str "custom",Space,Str "properties"])]})
+[Para [Str "Testing",Space,Str "document",Space,Str "properties"]]