WP4d #16
|
|
@ -1,7 +1,7 @@
|
|||
"""
|
||||
FILE: app/core/chunking/chunking_parser.py
|
||||
DESCRIPTION: Zerlegt Markdown in logische Einheiten (RawBlocks).
|
||||
Hält H1-Überschriften im Inhalts-Stream.
|
||||
DESCRIPTION: Zerlegt Markdown in logische Blöcke (RawBlocks).
|
||||
Gewährleistet, dass H1 und Trenner im Stream verbleiben.
|
||||
"""
|
||||
import re
|
||||
from typing import List, Tuple, Set
|
||||
|
|
@ -20,28 +20,21 @@ def split_sentences(text: str) -> list[str]:
|
|||
def parse_blocks(md_text: str) -> Tuple[List[RawBlock], str]:
|
||||
"""Zerlegt Text in logische Einheiten (RawBlocks), inklusive H1-H6."""
|
||||
blocks = []
|
||||
h1_title = "Dokument"
|
||||
section_path = "/"
|
||||
current_section_title = None
|
||||
|
||||
# Frontmatter entfernen
|
||||
h1_title = "Dokument"; section_path = "/"; current_section_title = None
|
||||
fm, text_without_fm = extract_frontmatter_from_text(md_text)
|
||||
|
||||
# H1 für Note-Titel extrahieren
|
||||
# H1 für Metadaten extrahieren
|
||||
h1_match = re.search(r'^#\s+(.*)', text_without_fm, re.MULTILINE)
|
||||
if h1_match:
|
||||
h1_title = h1_match.group(1).strip()
|
||||
if h1_match: h1_title = h1_match.group(1).strip()
|
||||
|
||||
lines = text_without_fm.split('\n')
|
||||
buffer = []
|
||||
|
||||
for line in lines:
|
||||
stripped = line.strip()
|
||||
|
||||
# Heading-Erkennung (H1 bis H6)
|
||||
heading_match = re.match(r'^(#{1,6})\s+(.*)', stripped)
|
||||
|
||||
if heading_match:
|
||||
# Vorherigen Text-Block abschließen
|
||||
if buffer:
|
||||
content = "\n".join(buffer).strip()
|
||||
if content:
|
||||
|
|
@ -51,19 +44,14 @@ def parse_blocks(md_text: str) -> Tuple[List[RawBlock], str]:
|
|||
level = len(heading_match.group(1))
|
||||
title = heading_match.group(2).strip()
|
||||
|
||||
# Pfad- und Titel-Update für die Metadaten der folgenden Blöcke
|
||||
if level == 1:
|
||||
current_section_title = title
|
||||
section_path = "/"
|
||||
current_section_title = title; section_path = "/"
|
||||
elif level == 2:
|
||||
current_section_title = title
|
||||
section_path = f"/{current_section_title}"
|
||||
current_section_title = title; section_path = f"/{current_section_title}"
|
||||
|
||||
# Die Überschrift selbst als Block hinzufügen
|
||||
blocks.append(RawBlock("heading", stripped, level, section_path, current_section_title))
|
||||
continue
|
||||
|
||||
# Trenner oder Leerzeilen beenden Blöcke, außer innerhalb von Callouts
|
||||
if (not stripped or stripped == "---") and not line.startswith('>'):
|
||||
if buffer:
|
||||
content = "\n".join(buffer).strip()
|
||||
|
|
@ -77,22 +65,19 @@ def parse_blocks(md_text: str) -> Tuple[List[RawBlock], str]:
|
|||
|
||||
if buffer:
|
||||
content = "\n".join(buffer).strip()
|
||||
if content:
|
||||
blocks.append(RawBlock("paragraph", content, None, section_path, current_section_title))
|
||||
if content: blocks.append(RawBlock("paragraph", content, None, section_path, current_section_title))
|
||||
|
||||
return blocks, h1_title
|
||||
|
||||
def parse_edges_robust(text: str) -> Set[str]:
|
||||
"""Extrahiert Kanten-Kandidaten aus Wikilinks und Callouts."""
|
||||
"""Extrahiert Kanten aus Wikilinks und Callouts."""
|
||||
found_edges = set()
|
||||
inlines = re.findall(r'\[\[rel:([^\|\]]+)\|?([^\]]*)\]\]', text)
|
||||
for kind, target in inlines:
|
||||
k = kind.strip().lower()
|
||||
t = target.strip()
|
||||
k = kind.strip().lower(); t = target.strip()
|
||||
if k and t: found_edges.add(f"{k}:{t}")
|
||||
|
||||
lines = text.split('\n')
|
||||
current_edge_type = None
|
||||
lines = text.split('\n'); current_edge_type = None
|
||||
for line in lines:
|
||||
stripped = line.strip()
|
||||
callout_match = re.match(r'>\s*\[!edge\]\s*([^:\s]+)', stripped)
|
||||
|
|
@ -106,6 +91,5 @@ def parse_edges_robust(text: str) -> Set[str]:
|
|||
links = re.findall(r'\[\[([^\]]+)\]\]', stripped)
|
||||
for l in links:
|
||||
if "rel:" not in l: found_edges.add(f"{current_edge_type}:{l}")
|
||||
elif not stripped.startswith('>'):
|
||||
current_edge_type = None
|
||||
elif not stripped.startswith('>'): current_edge_type = None
|
||||
return found_edges
|
||||
|
|
@ -1,15 +1,18 @@
|
|||
"""
|
||||
FILE: app/core/chunking/chunking_strategies.py
|
||||
DESCRIPTION: Universelle Strategie für atomares Sektions-Chunking v3.5.0.
|
||||
DESCRIPTION: Universelle Strategie für atomares Sektions-Chunking v3.6.0.
|
||||
Garantiert Sektions-Integrität durch präventives Chunk-Management.
|
||||
"""
|
||||
import math
|
||||
from typing import List, Dict, Any, Optional
|
||||
from .chunking_models import RawBlock, Chunk
|
||||
from .chunking_utils import estimate_tokens
|
||||
from .chunking_parser import split_sentences
|
||||
|
||||
def _accurate_estimate_tokens(text: str) -> int:
|
||||
"""Konservative Schätzung für deutschen Text (len/2.5 statt len/4)."""
|
||||
return max(1, math.ceil(len(text.strip()) / 2.5))
|
||||
|
||||
def _create_context_win(doc_title: str, sec_title: Optional[str], text: str) -> str:
|
||||
"""Baut den Breadcrumb-Kontext für das Embedding-Fenster."""
|
||||
parts = []
|
||||
if doc_title: parts.append(doc_title)
|
||||
if sec_title and sec_title != doc_title: parts.append(sec_title)
|
||||
|
|
@ -18,8 +21,8 @@ def _create_context_win(doc_title: str, sec_title: Optional[str], text: str) ->
|
|||
|
||||
def strategy_by_heading(blocks: List[RawBlock], config: Dict[str, Any], note_id: str, doc_title: str = "") -> List[Chunk]:
|
||||
"""
|
||||
Universelles Sektions-Chunking: Packt Sektionen in Chunks.
|
||||
Bei Überlauf wird die komplette Sektion in den nächsten Chunk geschoben.
|
||||
Sektions-Chunking: Packt komplette Abschnitte in Chunks.
|
||||
Bei Überlauf wird die Sektion ohne Ausnahme in den nächsten Chunk geschoben.
|
||||
"""
|
||||
target = config.get("target", 400)
|
||||
max_tokens = config.get("max", 600)
|
||||
|
|
@ -29,8 +32,8 @@ def strategy_by_heading(blocks: List[RawBlock], config: Dict[str, Any], note_id:
|
|||
|
||||
chunks: List[Chunk] = []
|
||||
|
||||
# --- HILFSFUNKTION: Erzeugt einen Chunk aus einer Blockliste ---
|
||||
def _create_chunk_from_blocks(block_list: List[RawBlock]):
|
||||
def _emit_chunk(block_list: List[RawBlock]):
|
||||
"""Schreibt eine Liste von Blöcken als einen einzigen, ungeteilten Chunk."""
|
||||
if not block_list: return
|
||||
txt = "\n\n".join([b.text for b in block_list])
|
||||
idx = len(chunks)
|
||||
|
|
@ -39,13 +42,13 @@ def strategy_by_heading(blocks: List[RawBlock], config: Dict[str, Any], note_id:
|
|||
win = _create_context_win(doc_title, title, txt)
|
||||
chunks.append(Chunk(
|
||||
id=f"{note_id}#c{idx:02d}", note_id=note_id, index=idx,
|
||||
text=txt, window=win, token_count=estimate_tokens(txt),
|
||||
text=txt, window=win, token_count=_accurate_estimate_tokens(txt),
|
||||
section_title=title, section_path=path,
|
||||
neighbors_prev=None, neighbors_next=None
|
||||
))
|
||||
|
||||
# --- HILFSFUNKTION: Splittet eine einzelne Sektion, die > max ist ---
|
||||
def _split_giant_section(sec_blocks: List[RawBlock]):
|
||||
"""Notfall-Split: Nur wenn eine EINZELNE Sektion bereits > max ist."""
|
||||
full_text = "\n\n".join([b.text for b in sec_blocks])
|
||||
main_title = sec_blocks[0].section_title
|
||||
main_path = sec_blocks[0].section_path
|
||||
|
|
@ -55,85 +58,70 @@ def strategy_by_heading(blocks: List[RawBlock], config: Dict[str, Any], note_id:
|
|||
cur_sents = []; sub_len = 0
|
||||
|
||||
for s in sents:
|
||||
slen = estimate_tokens(s)
|
||||
slen = _accurate_estimate_tokens(s)
|
||||
if sub_len + slen > target and cur_sents:
|
||||
combined_text = " ".join(cur_sents)
|
||||
_create_chunk_from_blocks([RawBlock("paragraph", combined_text, None, main_path, main_title)])
|
||||
|
||||
# Context Injection: Überschrift für den nächsten Teil-Chunk
|
||||
_emit_chunk([RawBlock("paragraph", " ".join(cur_sents), None, main_path, main_title)])
|
||||
ov_s = [header_text] if header_text else []
|
||||
ov_l = estimate_tokens(header_text) if header_text else 0
|
||||
ov_l = _accurate_estimate_tokens(header_text) if header_text else 0
|
||||
for os in reversed(cur_sents):
|
||||
if os == header_text: continue
|
||||
t_len = estimate_tokens(os)
|
||||
t_len = _accurate_estimate_tokens(os)
|
||||
if ov_l + t_len < overlap:
|
||||
ov_s.insert(len(ov_s)-1 if header_text else 0, os)
|
||||
ov_l += t_len
|
||||
else: break
|
||||
cur_sents = list(ov_s); cur_sents.append(s); sub_len = ov_l + slen
|
||||
else:
|
||||
cur_sents.append(s); sub_len += slen
|
||||
else: cur_sents.append(s); sub_len += slen
|
||||
|
||||
if cur_sents:
|
||||
_create_chunk_from_blocks([RawBlock("paragraph", " ".join(cur_sents), None, main_path, main_title)])
|
||||
if cur_sents: _emit_chunk([RawBlock("paragraph", " ".join(cur_sents), None, main_path, main_title)])
|
||||
|
||||
# 1. SCHRITT: Gruppierung in atomare Sektions-Einheiten
|
||||
# 1. Gruppierung in atomare Einheiten
|
||||
sections: List[List[RawBlock]] = []
|
||||
curr_sec: List[RawBlock] = []
|
||||
for b in blocks:
|
||||
# Eine neue Überschrift auf oder unter dem split_level startet eine neue Sektion
|
||||
if b.kind == "heading" and b.level <= split_level:
|
||||
if curr_sec: sections.append(curr_sec)
|
||||
curr_sec = [b]
|
||||
else:
|
||||
curr_sec.append(b)
|
||||
else: curr_sec.append(b)
|
||||
if curr_sec: sections.append(curr_sec)
|
||||
|
||||
# 2. SCHRITT: Sektionen in Chunks packen (Das universelle Pack-Verfahren)
|
||||
# 2. Das Pack-Verfahren (Kein Zerschneiden beim Flashen!)
|
||||
candidate_chunk: List[RawBlock] = []
|
||||
candidate_tokens = 0
|
||||
|
||||
for sec in sections:
|
||||
sec_text = "\n\n".join([b.text for b in sec])
|
||||
sec_tokens = estimate_tokens(sec_text)
|
||||
sec_tokens = _accurate_estimate_tokens(sec_text)
|
||||
|
||||
# Passt diese gesamte Sektion noch in den laufenden Chunk?
|
||||
# Prüfung: Passt die Sektion noch dazu?
|
||||
if candidate_tokens + sec_tokens <= max_tokens:
|
||||
candidate_chunk.extend(sec)
|
||||
candidate_tokens = estimate_tokens("\n\n".join([b.text for b in candidate_chunk]))
|
||||
candidate_tokens = _accurate_estimate_tokens("\n\n".join([b.text for b in candidate_chunk]))
|
||||
else:
|
||||
# Falls der aktuelle Chunk nicht leer ist: Raus damit, bevor die neue Sektion kommt
|
||||
# Chunk ist voll -> Abschluss an Sektionsgrenze
|
||||
if candidate_chunk:
|
||||
_create_chunk_from_blocks(candidate_chunk)
|
||||
_emit_chunk(candidate_chunk)
|
||||
candidate_chunk = []
|
||||
candidate_tokens = 0
|
||||
|
||||
# Die neue Sektion ist nun allein. Ist sie selbst zu groß?
|
||||
# Neue Sektion allein prüfen
|
||||
if sec_tokens > max_tokens:
|
||||
_split_giant_section(sec)
|
||||
else:
|
||||
candidate_chunk = list(sec)
|
||||
candidate_tokens = sec_tokens
|
||||
|
||||
# Letzten Rest wegschreiben
|
||||
if candidate_chunk:
|
||||
_create_chunk_from_blocks(candidate_chunk)
|
||||
|
||||
if candidate_chunk: _emit_chunk(candidate_chunk)
|
||||
return chunks
|
||||
|
||||
def strategy_sliding_window(blocks: List[RawBlock], config: Dict[str, Any], note_id: str, context_prefix: str = "") -> List[Chunk]:
|
||||
"""Standard-Sliding-Window für flache Texte ohne Sektionsfokus."""
|
||||
target = config.get("target", 400)
|
||||
max_tokens = config.get("max", 600)
|
||||
chunks: List[Chunk] = []
|
||||
buf: List[RawBlock] = []
|
||||
|
||||
target = config.get("target", 400); max_tokens = config.get("max", 600)
|
||||
chunks: List[Chunk] = []; buf: List[RawBlock] = []
|
||||
for b in blocks:
|
||||
b_tokens = estimate_tokens(b.text)
|
||||
current_tokens = sum(estimate_tokens(x.text) for x in buf) if buf else 0
|
||||
b_tokens = _accurate_estimate_tokens(b.text)
|
||||
current_tokens = sum(_accurate_estimate_tokens(x.text) for x in buf) if buf else 0
|
||||
if current_tokens + b_tokens > max_tokens and buf:
|
||||
txt = "\n\n".join([x.text for x in buf])
|
||||
idx = len(chunks)
|
||||
txt = "\n\n".join([x.text for x in buf]); idx = len(chunks)
|
||||
win = f"{context_prefix}\n{txt}".strip() if context_prefix else txt
|
||||
chunks.append(Chunk(id=f"{note_id}#c{idx:02d}", note_id=note_id, index=idx, text=txt, window=win, token_count=current_tokens, section_title=buf[0].section_title, section_path=buf[0].section_path, neighbors_prev=None, neighbors_next=None))
|
||||
buf = []
|
||||
|
|
@ -141,5 +129,5 @@ def strategy_sliding_window(blocks: List[RawBlock], config: Dict[str, Any], note
|
|||
if buf:
|
||||
txt = "\n\n".join([x.text for x in buf]); idx = len(chunks)
|
||||
win = f"{context_prefix}\n{txt}".strip() if context_prefix else txt
|
||||
chunks.append(Chunk(id=f"{note_id}#c{idx:02d}", note_id=note_id, index=idx, text=txt, window=win, token_count=estimate_tokens(txt), section_title=buf[0].section_title, section_path=buf[0].section_path, neighbors_prev=None, neighbors_next=None))
|
||||
chunks.append(Chunk(id=f"{note_id}#c{idx:02d}", note_id=note_id, index=idx, text=txt, window=win, token_count=_accurate_estimate_tokens(txt), section_title=buf[0].section_title, section_path=buf[0].section_path, neighbors_prev=None, neighbors_next=None))
|
||||
return chunks
|
||||
Loading…
Reference in New Issue
Block a user