feat: added different content-layers (#345)

* feat: added different content-layers

Signed-off-by: Peter Staar <[email protected]>

* reformatted code

Signed-off-by: Peter Staar <[email protected]>

* renamed concealed to invisible

Signed-off-by: Peter Staar <[email protected]>

* fixed docs

Signed-off-by: Peter Staar <[email protected]>

* Update docling_core/types/doc/document.py

Co-authored-by: Panos Vagenas <[email protected]>
Signed-off-by: Christoph Auer <[email protected]>

* Update docs/DoclingDocument.json

Co-authored-by: Panos Vagenas <[email protected]>
Signed-off-by: Christoph Auer <[email protected]>

---------

Signed-off-by: Peter Staar <[email protected]>
Signed-off-by: Christoph Auer <[email protected]>
Co-authored-by: Christoph Auer <[email protected]>
Co-authored-by: Panos Vagenas <[email protected]>

Author: 3 people

docling_core/types/doc/document.py

@@ -731,9 +731,11 @@ class ProvenanceItem(BaseModel):
 class ContentLayer(str, Enum):
     """ContentLayer."""
 
-    BODY = "body"
-    FURNITURE = "furniture"
-    BACKGROUND = "background"
+    BODY = "body"  # main content of the document
+    FURNITURE = "furniture"  # eg page-headers/footers
+    BACKGROUND = "background"  # eg watermarks
+    INVISIBLE = "invisible"  # hidden or invisible text
+    NOTES = "notes"  # author/speaker notes, corrections, etc
 
 
 DEFAULT_CONTENT_LAYERS = {ContentLayer.BODY}

docs/DoclingDocument.json

@@ -362,7 +362,9 @@
       "enum": [
         "body",
         "furniture",
-        "background"
+        "background",
+        "invisible",
+        "notes"
       ],
       "title": "ContentLayer",
       "type": "string"