fix: include titles to chunk heading metadata (#62)

Signed-off-by: Panos Vagenas <[email protected]>

Author: vagenas

docling_core/transforms/chunker/hierarchical_chunker.py

@@ -183,14 +183,15 @@ def chunk(self, dl_doc: DLDocument, **kwargs: Any) -> Iterator[BaseChunk]:
                         )
                         list_items = []  # reset
 
-                if isinstance(
-                    item, SectionHeaderItem
-                ) or (  # TODO remove when all captured as SectionHeaderItem:
+                if isinstance(item, SectionHeaderItem) or (
                     isinstance(item, TextItem)
-                    and item.label == DocItemLabel.SECTION_HEADER
+                    and item.label in [DocItemLabel.SECTION_HEADER, DocItemLabel.TITLE]
                 ):
-                    # TODO second branch not needed once cleanup above complete:
-                    level = item.level if isinstance(item, SectionHeaderItem) else 1
+                    level = (
+                        item.level
+                        if isinstance(item, SectionHeaderItem)
+                        else (0 if item.label == DocItemLabel.TITLE else 1)
+                    )
                     heading_by_level[level] = item.text
 
                     # remove headings of higher level as they just went out of scope

test/data/chunker/0_inp_dl_doc.json

@@ -547,7 +547,7 @@
                 "$ref": "#/body"
             },
             "children": [],
-            "label": "section_header",
+            "label": "title",
             "prov": [
                 {
                     "page_no": 1,
@@ -652,7 +652,7 @@
             },
             "children": [],
             "label": "section_header",
-            "level": 2,
+            "level": 1,
             "prov": [
                 {
                     "page_no": 1,
@@ -705,6 +705,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 1,
@@ -1017,6 +1018,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 2,
@@ -1147,6 +1149,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 2,
@@ -1199,6 +1202,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 2,
             "prov": [
                 {
                     "page_no": 2,
@@ -1381,6 +1385,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 2,
             "prov": [
                 {
                     "page_no": 3,
@@ -1433,6 +1438,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 3,
             "prov": [
                 {
                     "page_no": 3,
@@ -1511,6 +1517,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 3,
             "prov": [
                 {
                     "page_no": 3,
@@ -1615,6 +1622,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 3,
             "prov": [
                 {
                     "page_no": 4,
@@ -1693,6 +1701,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 2,
             "prov": [
                 {
                     "page_no": 4,
@@ -1745,6 +1754,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 2,
             "prov": [
                 {
                     "page_no": 4,
@@ -1823,6 +1833,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 4,
@@ -2005,6 +2016,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 5,
@@ -2057,6 +2069,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 5,
@@ -2135,6 +2148,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 5,
@@ -2655,6 +2669,7 @@
             },
             "children": [],
             "label": "section_header",
+            "level": 1,
             "prov": [
                 {
                     "page_no": 7,