chore: import upstream snapshot with attribution

docs-website/reference_versioned_docs/version-2.26/integrations-api/docling.md

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+---
+title: "Docling"
+id: integrations-docling
+description: "Docling integration for Haystack"
+slug: "/integrations-docling"
+---
+
+
+## haystack_integrations.components.converters.docling.converter
+
+Docling Haystack converter module.
+
+### ExportType
+
+Bases: <code>str</code>, <code>Enum</code>
+
+Enumeration of available export types.
+
+### BaseMetaExtractor
+
+Bases: <code>ABC</code>
+
+BaseMetaExtractor.
+
+#### extract_chunk_meta
+
+```python
+extract_chunk_meta(chunk: BaseChunk) -> dict[str, Any]
+```
+
+Extract chunk meta.
+
+#### extract_dl_doc_meta
+
+```python
+extract_dl_doc_meta(dl_doc: DoclingDocument) -> dict[str, Any]
+```
+
+Extract Docling document meta.
+
+#### to_dict
+
+```python
+to_dict() -> dict[str, Any]
+```
+
+Serialize to a dictionary.
+
+#### from_dict
+
+```python
+from_dict(data: dict[str, Any]) -> BaseMetaExtractor
+```
+
+Deserialize from a dictionary.
+
+### MetaExtractor
+
+Bases: <code>BaseMetaExtractor</code>
+
+MetaExtractor.
+
+#### extract_chunk_meta
+
+```python
+extract_chunk_meta(chunk: BaseChunk) -> dict[str, Any]
+```
+
+Extract chunk meta.
+
+#### extract_dl_doc_meta
+
+```python
+extract_dl_doc_meta(dl_doc: DoclingDocument) -> dict[str, Any]
+```
+
+Extract Docling document meta.
+
+### DoclingConverter
+
+Docling Haystack converter.
+
+#### __init__
+
+```python
+__init__(
+    converter: DocumentConverter | None = None,
+    convert_kwargs: dict[str, Any] | None = None,
+    export_type: ExportType = ExportType.MARKDOWN,
+    md_export_kwargs: dict[str, Any] | None = None,
+    chunker: BaseChunker | None = None,
+    meta_extractor: BaseMetaExtractor | None = None,
+) -> None
+```
+
+Create a Docling Haystack converter.
+
+**Parameters:**
+
+- **converter** (<code>DocumentConverter | None</code>) – The Docling `DocumentConverter` to use; if not set, a system
+  default is used.
+- **convert_kwargs** (<code>dict\[str, Any\] | None</code>) – Any parameters to pass to Docling conversion; if not set, a
+  system default is used.
+- **export_type** (<code>ExportType</code>) – The export mode to use:
+
+* `ExportType.MARKDOWN` (default) captures each input document as a single
+  markdown `Document`.
+* `ExportType.DOC_CHUNKS` first chunks each input document and then returns
+  one `Document` per chunk.
+* `ExportType.JSON` serializes the full Docling document to a JSON string.
+
+- **md_export_kwargs** (<code>dict\[str, Any\] | None</code>) – Any parameters to pass to Markdown export (applicable in
+  case of `ExportType.MARKDOWN`).
+- **chunker** (<code>BaseChunker | None</code>) – The Docling chunker instance to use; if not set, a system default
+  is used.
+- **meta_extractor** (<code>BaseMetaExtractor | None</code>) – The extractor instance to use for populating the output
+  document metadata; if not set, a system default is used.
+
+#### warm_up
+
+```python
+warm_up() -> None
+```
+
+Build the default `HybridChunker` for `ExportType.DOC_CHUNKS` if no `chunker` was passed at init time.
+
+Deferred to warm-up time because constructing the default chunker downloads a Hugging Face tokenizer.
+
+#### to_dict
+
+```python
+to_dict() -> dict[str, Any]
+```
+
+Serialize this component to a dictionary.
+
+#### from_dict
+
+```python
+from_dict(data: dict[str, Any]) -> DoclingConverter
+```
+
+Deserialize this component from a dictionary.
+
+The `converter` and `chunker` parameters are not serializable and are always ignored during
+deserialization; the restored instance will use the default `DocumentConverter` and `HybridChunker`
+respectively.
+
+**Parameters:**
+
+- **data** (<code>dict\[str, Any\]</code>) – Dictionary with keys `type` and `init_parameters`, as produced by `to_dict`.
+
+**Returns:**
+
+- <code>DoclingConverter</code> – A new `DoclingConverter` instance.
+
+#### run
+
+```python
+run(
+    paths: list[str | Path] | None = None,
+    sources: list[str | Path | ByteStream] | None = None,
+    meta: dict[str, Any] | list[dict[str, Any]] | None = None,
+) -> dict[str, list[Document]]
+```
+
+Run the DoclingConverter.
+
+**Parameters:**
+
+- **paths** (<code>list\[str | Path\] | None</code>) – Deprecated. Use `sources` instead.
+- **sources** (<code>list\[str | Path | ByteStream\] | None</code>) – List of file paths, URLs, or ByteStream objects to convert.
+- **meta** (<code>dict\[str, Any\] | list\[dict\[str, Any\]\] | None</code>) – Optional metadata to attach to the Documents.
+  This value can be either a list of dictionaries or a single dictionary.
+  If it's a single dictionary, its content is added to the metadata of all produced Documents.
+  If it's a list, the length of the list must match the number of sources, because the two lists will
+  be zipped.
+  If a source is a ByteStream, its own metadata is also merged into the output.
+
+**Returns:**
+
+- <code>dict\[str, list\[Document\]\]</code> – A dictionary with key `"documents"` containing the output Haystack Documents.
+
+**Raises:**
+
+- <code>ValueError</code> – If `meta` is a list whose length does not match the number of sources.
+- <code>RuntimeError</code> – If an unexpected `export_type` is encountered.