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fix: convert headings to plain text in table cells (issue #2722) #540

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fix: convert headings to plain text in table cells (issue #2722) #540

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9a64509
fix: convert headings to plain text in table cells (issue #2722)
Mar 9, 2026
9767ec9
DCO Remediation Commit for 温可 <wenke@openclaw.ai>
Mar 9, 2026
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10 changes: 8 additions & 2 deletions docling_core/transforms/serializer/markdown.py
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Original file line number Diff line number Diff line change
Expand Up @@ -191,6 +191,7 @@ def serialize(
doc_serializer: BaseDocSerializer,
doc: DoclingDocument,
is_inline_scope: bool = False,
in_table_cell: bool = False,
visited: Optional[set[str]] = None, # refs of visited items
**kwargs: Any,
) -> SerializationResult:
Expand Down Expand Up @@ -269,7 +270,7 @@ def serialize(
pieces.append(text)
text_part = " ".join(pieces)
else:
text_part = self._format_heading(text, item)
text_part = self._format_heading(text, item, in_table_cell=in_table_cell)
elif isinstance(item, CodeItem):
if params.format_code_blocks:
# inline items and all hyperlinks: use single backticks
Expand Down Expand Up @@ -318,8 +319,13 @@ def _format_heading(
self,
text: str,
item: Union[TitleItem, SectionHeaderItem],
in_table_cell: bool = False,
) -> str:
"""Format a heading/title item. Override to customize heading representation."""
# According to markdown specs, headings are not allowed inside tables
# Convert to plain text when in table cell
if in_table_cell:
return text
num_hashes = 1 if isinstance(item, TitleItem) else item.level + 1
return f"{num_hashes * '#'} {text}"

Expand Down Expand Up @@ -532,7 +538,7 @@ def serialize(
for col in row:
if isinstance(col, RichTableCell):
ref_item = col.ref.resolve(doc=doc)
inner_kwargs = {**kwargs, "_nested_in_table": True}
inner_kwargs = {**kwargs, "_nested_in_table": True, "in_table_cell": True}
cell_text = doc_serializer.serialize(
item=ref_item,
**inner_kwargs,
Expand Down
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