document-extraction（文档提取）

Document Extraction (ADE)

Overview

LandingAI's Agentic Document Extraction (ADE) is a document processing SaaS that parses, extracts, and classifies documents without requiring templates or training. It provides three main capabilities:

1. Parse: Convert documents into structured Markdown with hierarchical JSON representation
2. Extract: Pull specific structured data using JSON schemas or Pydantic models
3. Split: Classify and separate multi-document batches by type

Key Benefits:

• No ML training or templates required
• Layout-agnostic parsing (works with any document structure)
• Supports 20+ file formats (PDF, images, spreadsheets, presentations)
• Precise visual grounding (bounding boxes, page numbers)
• Multiple models optimized for different document types

Quick Start

1. Installation

Never install packages globally without user approval. Always check for a local Python environment first.

1. .venv/bin/python       — uv-managed (this project)
2. venv/bin/python        — standard Python venv
3. uv run python          — if pyproject.toml exists
4. poetry run python      — if poetry.lock exists
5. python3                — system fallback; warn the user

Use the local environment to install: landingai-ade, python-dotenv

2. API Key Setup

The user may have already setup a .env file in the same directory as the document-extraction skill with the API key. You MUST check this path first (ls -la.*/skills/document-extraction/.env). Also try checking on the same directory as this SKILL.md file.

If not, provide instructions to create one. The script below will search for .env in common locations and load it.

.venv/bin/python - << 'EOF'
import os
from pathlib import Path
from dotenv import load_dotenv

# Load API key: prefer existing env var, then .env file lookup
if os.environ.get("VISION_AGENT_API_KEY"):
    print("API key found in existing environment variable")
else:
    def _find_env():
        for d in [Path.cwd().resolve(), *Path.cwd().resolve().parents]:
            for candidate in [
                # ADD the directory where the document-extraction skill is located
                d / '.env',
                d / 'document-extraction/.env',
                d / 'skills/document-extraction/.env',
            ]:
                if candidate.is_file():
                    return candidate
        return None
    env = _find_env()
    if env:
        load_dotenv(env)
        print(f"API key loaded from: {env}")
    else:
        print("Warning: VISION_AGENT_API_KEY not set and no .env found")
EOF

If not key is found instruct the user to get an API key from https://va.landing.ai/settings/api-key

Copy .env-sample to .env and add your API key:

cp .env-sample .env

Edit .env and add your key:

VISION_AGENT_API_KEY=your_actual_api_key_here

Note: The .env file is gitignored for security. Advanced users can also set the environment variable directly: export VISION_AGENT_API_KEY=<your-key>

EU Endpoint: If using the EU endpoint, set environment="eu" when initializing the client.

3. Basic Parse Example

from dotenv import load_dotenv
load_dotenv()  # Load API key from .env

from landingai_ade import LandingAIADE
from pathlib import Path

client = LandingAIADE()

# Parse a document
response = client.parse(
    document=Path("document.pdf"),
    model="dpt-2-latest"
)

# Access results
print(f"Pages: {response.metadata.page_count}")
print(f"Chunks: {len(response.chunks)}")
print("\nMarkdown output:")
print(response.markdown[:500])  # First 500 chars

# Save Markdown for extraction
with open("output.md", "w", encoding="utf-8") as f:
    f.write(response.markdown)

4. Basic Extract Example

from dotenv import load_dotenv
load_dotenv()

from landingai_ade import LandingAIADE
from landingai_ade.lib import pydantic_to_json_schema
from pydantic import BaseModel, Field
from pathlib import Path

# Define extraction schema using Pydantic
class Invoice(BaseModel):
    invoice_number: str = Field(description="Invoice number")
    invoice_date: str = Field(description="Invoice date")
    total_amount: float = Field(description="Total amount in USD")
    vendor_name: str = Field(description="Vendor name")

# Convert to JSON schema
schema = pydantic_to_json_schema(Invoice)

client = LandingAIADE()

# Extract from parsed markdown
response = client.extract(
    schema=schema,
    markdown=Path("output.md"),  # From parse step
    model="extract-latest"
)

# Access extracted data
print(response.extraction)
# Output: {'invoice_number': 'INV-12345', 'invoice_date': '2024-01-15', ...}

# Check extraction metadata (traceability)
print(response.extraction_metadata)

Document Parsing

Parse Local Files

from dotenv import load_dotenv
load_dotenv()

from landingai_ade import LandingAIADE
from pathlib import Path

client = LandingAIADE()

response = client.parse(
    document=Path("/path/to/document.pdf"),
    model="dpt-2-latest"
)

# Work with chunks
for chunk in response.chunks:
    print(f"Type: {chunk.type}, Page: {chunk.grounding.page}")
    print(f"Content: {chunk.markdown[:100]}...")

Parse Remote URLs

response = client.parse(
    document_url="https://example.com/document.pdf",
    model="dpt-2-latest"
)

Parse Spreadsheets

Spreadsheets (CSV, XLSX) return a different response type than documents. Key differences:

response = client.parse(
    document=Path("data.xlsx"),
    model="dpt-2-latest"
)

# Spreadsheet metadata
print(f"Sheets: {response.metadata.sheet_count}")
print(f"Total rows: {response.metadata.total_rows}")
print(f"Total cells: {response.metadata.total_cells}")

# Splits use 'sheets' instead of 'pages'
for split in response.splits:
    print(f"Sheet indices: {split.sheets}")
    print(f"Markdown: {split.markdown[:200]}...")

Model Selection

Choose the right model for your documents:

Recommendation: Use dpt-2-latest unless you have simple documents where cost/speed is critical.

Version Pinning: For production, use dated versions (e.g., dpt-2-20260302) for reproducibility.

Parse Large Files (Async)

For files up to 1 GB or 6,000 pages, use Parse Jobs:

import time
from dotenv import load_dotenv
load_dotenv()

from landingai_ade import LandingAIADE
from pathlib import Path

client = LandingAIADE()

# Step 1: Create parse job
job = client.parse_jobs.create(
    document=Path("large_document.pdf"),
    model="dpt-2-latest"
)

job_id = job.job_id
print(f"Job {job_id} created")

# Step 2: Poll for completion
while True:
    response = client.parse_jobs.get(job_id)
    if response.status == "completed":
        print(f"Job {job_id} completed")
        break
    print(f"Progress: {response.progress * 100:.0f}%")
    time.sleep(5)

# Step 3: Access results
# Results are in response.data (or response.output_url for large results)
if response.data:
    print(f"Chunks: {len(response.data.chunks)}")
    with open("output.md", "w", encoding="utf-8") as f:
        f.write(response.data.markdown)
elif response.output_url:
    # Results > 1MB are returned as a presigned URL
    print(f"Download results from: {response.output_url}")

Job Status Response Fields:

• job_id, status (pending, processing, completed, failed, cancelled), progress (0-1)
• data: The ParseResponse (or SpreadsheetParseResponse) when complete and result < 1MB
• output_url: Presigned S3 URL when result > 1MB or when output_save_url was used. Expires after 1 hour; a new URL is generated on each GET.
• metadata: Same as sync parse (filename, page_count, duration_ms, etc.)
• failure_reason: Error message if job failed

Zero Data Retention (ZDR)

If ZDR is enabled for your organization, you must provide an output_save_url where parsed results will be saved. The results will not be returned in the API response. ZDR is not enabled by default. Typically output_save_url is a presigned url with write permissions to your S3 bucket, but you can also use other storage solutions that support file uploads via HTTP PUT requests.

job = client.parse_jobs.create(
    document=Path("sensitive_document.pdf"),
    model="dpt-2-latest",
    output_save_url="https://your-bucket.s3.amazonaws.com/output.json"
)

List Parse Jobs

List all async parse jobs with optional pagination and status filtering:

# List recent jobs
jobs_response = client.parse_jobs.list(page=0, page_size=10)
for job in jobs_response.jobs:
    print(f"{job.job_id}: {job.status} ({job.progress:.0%})")

# Filter by status
completed = client.parse_jobs.list(status="completed", page_size=5)
print(f"Completed jobs: {len(completed.jobs)}, more: {completed.has_more}")

Available status filters: pending, processing, completed, failed, cancelled

Understanding Parse Outputs

Parse returns a ParseResponse with:

• markdown: Complete document in Markdown with HTML anchor tags
• chunks: Array of extracted elements (each with unique ID, type, content, and per-chunk grounding)
• grounding: Dictionary mapping element IDs to detailed location data (page, bounding box, grounding type, and table cell position). See JSON Response for structure.
• metadata: Processing info — filename, org_id, page_count, duration_ms, credit_usage (float), job_id, version, failed_pages
• splits: Array of split objects grouping chunks. Always present — contains a single "full" split by default, or per-page splits if split="page" was used. Note: Parse splits use a class field (values: "full" or "page"), which is different from the Split API's classification field.

Common chunk types: text, table, figure, logo, card, attestation, scan_code, marginalia

For detailed chunk type reference, see references/chunk-types.md

Anchor tag prefix in chunk.markdown: Every chunk's markdown field is prefixed with an HTML anchor tag embedding the chunk UUID: <a id='abc123...'></a>\n\nActual content…. This is how the full document markdown links back to individual chunks. Strip it before string matching, display, or RAG indexing: ``python import re _ANCHOR_RE = re.compile(r"<a[^>]*></a>\s*", re.IGNORECASE) def chunk_text(ch) -> str: """Return clean chunk markdown without the anchor prefix.""" return _ANCHOR_RE.sub("", ch.markdown or "").strip() # Example: fingerprint match against a section of the full markdown intro_chunks = [ch for ch in response.chunks if chunk_text(ch)[:80] in intro_markdown] ``

Saving Parse Responses

The SDK provides a built-in save_to parameter on parse(), extract(), and split() that automatically saves the JSON response to a folder:

from pathlib import Path

# Parse and auto-save response JSON to output/ folder
response = client.parse(
    document=Path("document.pdf"),
    model="dpt-2-latest",
    save_to="output/"  # Creates output/document_parse_output.json
)

# Response is still returned normally for immediate use
print(response.markdown[:200])

The save_to parameter:

• Creates the folder if it doesn't exist
• Names the file {input_filename}_{method}_output.json (e.g., document_parse_output.json)
• Works on client.parse(), client.extract(), and client.split()
• Is a client-side convenience — it saves the full response locally after the API call

For manual serialization (e.g., custom filenames or selective saving), use model_dump():

import json

response_dict = response.model_dump()
with open("parse_response.json", "w", encoding="utf-8") as f:
    json.dump(response_dict, f, indent=2, ensure_ascii=False)

# Save markdown separately for extraction
with open("document_parsed.md", "w", encoding="utf-8") as f:
    f.write(response.markdown)

Important: Always use model_dump() to serialize the complete response. Do not manually construct dictionaries with selected fields, as you may miss important data like the splits array or complete grounding information.

Parse Parameters

response = client.parse(
    document=Path("document.pdf"),
    model="dpt-2-latest",
    split="page",       # Optional: organize chunks by page
    password="secret",   # Optional: decrypt protected files (ZDR only)
    save_to="output/",   # Optional: auto-save response JSON
)

Parse Password-Protected Files

Organizations with Zero Data Retention (ZDR) enabled can parse password-protected files by passing the password parameter. Supported formats: PDF, DOC, DOCX, ODT, PPT, PPTX, XLSX.

# Sync parse
response = client.parse(
    document=Path("encrypted.pdf"),
    password="document_password",
    model="dpt-2-latest"
)

# Async parse jobs
job = client.parse_jobs.create(
    document=Path("encrypted.pdf"),
    password="document_password",
    model="dpt-2-latest"
)

Note: Without ZDR the API returns HTTP 422. If the password is wrong the API returns HTTP 422 with a decryption error. The parameter is ignored for unencrypted documents.

Structured Data Extraction

Schema Definition

Define what to extract using JSON Schema or Pydantic models.

Pydantic approach (recommended for Python):

from pydantic import BaseModel, Field
from landingai_ade.lib import pydantic_to_json_schema

class BankStatement(BaseModel):
    account_holder: str = Field(description="Account holder name")
    account_number: str = Field(description="Account number")
    beginning_balance: float = Field(description="Beginning balance in USD")
    ending_balance: float = Field(description="Ending balance in USD")

schema = pydantic_to_json_schema(BankStatement)

JSON Schema approach:

schema = {
    "type": "object",
    "properties": {
        "account_holder": {
            "type": "string",
            "description": "Account holder name"
        },
        "account_number": {
            "type": "string",
            "description": "Account number"
        },
        "beginning_balance": {
            "type": "number",
            "description": "Beginning balance in USD"
        },
        "ending_balance": {
            "type": "number",
            "description": "Ending balance in USD"
        }
    },
    "required": ["account_holder", "account_number"]
}

Extraction Workflow

from dotenv import load_dotenv
load_dotenv()

from landingai_ade import LandingAIADE
from pathlib import Path

client = LandingAIADE()

# Step 1: Parse document
parse_response = client.parse(
    document=Path("bank_statement.pdf"),
    model="dpt-2-latest"
)

# Save markdown
with open("parsed.md", "w", encoding="utf-8") as f:
    f.write(parse_response.markdown)

# Step 2: Extract structured data
extract_response = client.extract(
    schema=schema,  # Your JSON schema
    markdown=Path("parsed.md"),
    model="extract-latest"
)

# Access extracted data
print(extract_response.extraction)

# Check traceability (which chunks provided each field)
for field, metadata in extract_response.extraction_metadata.items():
    print(f"{field}: from chunks {metadata.chunk_ids}")

Extract from URL

You can extract from a remotely-hosted Markdown file using markdown_url:

extract_response = client.extract(
    schema=schema,
    markdown_url="https://example.com/parsed_document.md",
    model="extract-latest"
)

Common Schema Patterns

For detailed schema patterns, see references/extraction-schemas.md

Nested objects:

class Address(BaseModel):
    street: str
    city: str
    zip_code: str

class Invoice(BaseModel):
    invoice_number: str
    billing_address: Address  # Nested object

Arrays (lists):

class LineItem(BaseModel):
    description: str
    quantity: int
    amount: float

class Invoice(BaseModel):
    invoice_number: str
    line_items: list[LineItem]  # Array of objects

Enums (restricted values):

class BankStatement(BaseModel):
    account_type: str = Field(
        description="Account type",
        enum=["Checking", "Savings"]  # Only these values allowed
    )

Nullable fields:

class Patient(BaseModel):
    first_name: str
    middle_name: str | None = Field(default=None)  # Optional field
    last_name: str

Document Classification

Classify documents before extracting type-specific fields:

from dotenv import load_dotenv
load_dotenv()

from landingai_ade import LandingAIADE
from pydantic import BaseModel, Field
from landingai_ade.lib import pydantic_to_json_schema
from pathlib import Path

# Step 1: Define classification schema
class DocumentType(BaseModel):
    document_type: str = Field(
        description="Document classification",
        enum=["Invoice", "Receipt", "Bank Statement", "Other"]
    )

client = LandingAIADE()

# Step 2: Parse document
parse_response = client.parse(
    document=Path("document.pdf"),
    model="dpt-2-latest"
)

# Step 3: Classify document
classification_schema = pydantic_to_json_schema(DocumentType)
classification_response = client.extract(
    schema=classification_schema,
    markdown=parse_response.markdown,
    model="extract-latest"
)

doc_type = classification_response.extraction["document_type"]
print(f"Classified as: {doc_type}")

# Step 4: Extract based on type
if doc_type == "Invoice":
    schema = pydantic_to_json_schema(InvoiceSchema)
elif doc_type == "Receipt":
    schema = pydantic_to_json_schema(ReceiptSchema)
else:
    print("Unsupported document type")
    exit()

# Extract type-specific fields
extract_response = client.extract(
    schema=schema,
    markdown=parse_response.markdown,
    model="extract-latest"
)

Document Classification & Splitting

When to Use Split API

Use the Split API when you have multi-document batches on single file that need to be separated:

• Financial services: Separate bank statements, utility bills, ID documents
• Healthcare: Split intake forms, medical reports, medication lists
• Accounting: Separate multiple invoices and receipts
• Academic: Separate article bodies from references

Split Classification

Define how to classify and separate documents using split_class:

from dotenv import load_dotenv
load_dotenv()

from landingai_ade import LandingAIADE
from pathlib import Path

client = LandingAIADE()

# Step 1: Parse multi-document PDF
parse_response = client.parse(
    document=Path("batch.pdf"),
    model="dpt-2-latest"
)

# Step 2: Define split classes
split_classes = [
    {
        "name": "Invoice",
        "description": "Commercial invoices with itemized charges",
        "identifier": "Invoice Number"  # Separate by invoice number
    },
    {
        "name": "Receipt",
        "description": "Payment receipts showing transaction details",
        "identifier": "Receipt Date"
    },
    {
        "name": "Bank Statement",
        "description": "Monthly bank account statements"
    }
]

# Step 3: Split document
split_response = client.split(
    markdown=parse_response.markdown,
    split_class=split_classes
)

# Step 4: Process each split
for split in split_response.splits:
    print(f"Type: {split.classification}")
    print(f"Identifier: {split.identifier}")
    print(f"Pages: {split.pages}")
    print(f"Content: {split.markdowns[0][:200]}...")

Split Class Components:

• name (required): Document classification label (e.g., "Invoice")
• description (optional): Context for classification (more detail = better accuracy)
• identifier (optional): Field that makes each instance unique (creates separate split per unique value)
• Limit: Maximum 19 split classes per request

Split from URL: You can also split from a remotely-hosted Markdown file:

split_response = client.split(
    markdown_url="https://example.com/parsed_document.md",
    split_class=split_classes
)

Output Formats

Markdown

ADE converts documents to structured Markdown:

# Document Title

## Section 1

Paragraph text...

| Column 1 | Column 2 |
|----------|----------|
| Data 1   | Data 2   |

<::Caption: Bar chart showing quarterly revenue::>

Features:

• HTML anchor tags for traceability (link to chunk IDs)
• Special delimiters for visual elements: <::Caption: description::>
• HTML tables for spreadsheet data
• Preserved structure and hierarchy

JSON Response

Parse returns structured JSON with five top-level fields:

{
  "markdown": "# Document...",
  "chunks": [
    {
      "id": "7d58c5cf-e4f5-4a7e-ba34-0cd7bc6a6506",
      "type": "text",
      "markdown": "Content...",
      "grounding": {
        "page": 0,
        "box": { "left": 0.1, "top": 0.2, "right": 0.9, "bottom": 0.3 }
      }
    }
  ],
  "splits": [
    {
      "class": "full",
      "identifier": "full",
      "pages": [0],
      "markdown": "# Document...",
      "chunks": ["7d58c5cf-e4f5-4a7e-ba34-0cd7bc6a6506"]
    }
  ],
  "grounding": {
    "7d58c5cf-e4f5-4a7e-ba34-0cd7bc6a6506": {
      "box": { "left": 0.1, "top": 0.2, "right": 0.9, "bottom": 0.3 },
      "page": 0,
      "type": "chunkText",
      "confidence": 0.95,
      "low_confidence_spans": []
    },
    "0-1": {
      "box": { "left": 0.15, "top": 0.4, "right": 0.85, "bottom": 0.7 },
      "page": 0,
      "type": "table"
    },
    "0-2": {
      "box": { "left": 0.15, "top": 0.4, "right": 0.5, "bottom": 0.55 },
      "page": 0,
      "type": "tableCell",
      "position": { "row": 0, "col": 0, "rowspan": 1, "colspan": 1,
                     "chunk_id": "ef24b1ea-..." }
    }
  },
  "metadata": {
    "filename": "document.pdf",
    "org_id": "org-123",
    "page_count": 5,
    "duration_ms": 1500,
    "credit_usage": 2.0,
    "job_id": "abc-123",
    "version": "dpt-2-20260302",
    "failed_pages": []
  }
}

Top-level grounding is a dictionary keyed by element ID (UUID for chunks, {page}-{base62} for tables/cells). Each value contains box, page, type, and optionally confidence and low_confidence_spans (see Confidence Scores). Table cell entries also include a position field (see Grounding and Traceability).

Grounding Type Mapping

Grounding types use a chunk prefix to distinguish them from chunk types. The table and tableCell types are grounding-only (no corresponding chunk type):

Extract returns:

{
  "extraction": {
    "invoice_number": "INV-12345",
    "total": 1250.00
  },
  "extraction_metadata": {
    "invoice_number": {
      "chunk_ids": ["chunk-uuid-1"]
    },
    "total": {
      "chunk_ids": ["chunk-uuid-2"],
      "cell_ids": ["2-a5"]
    }
  },
  "metadata": {
    "filename": "markdown.md",
    "org_id": "org-123",
    "duration_ms": 850,
    "credit_usage": 1.0,
    "job_id": "abc-456",
    "version": "extract-20251024",
    "schema_violation_error": null,
    "fallback_model_version": null
  }
}

Extract Metadata Fields:

• schema_violation_error: null when extraction matches schema. Contains a detailed error message when the extracted data doesn't fully conform (HTTP 206 response). Extraction still returns partial data and consumes credits.
• fallback_model_version: null normally. Contains the model version actually used when the initial extraction attempt failed with the requested version and a fallback was used.

Grounding and Traceability

Every parsed element includes precise location information in the top-level grounding dictionary:

• Page references: Zero-indexed page numbers
• Bounding boxes: Normalized coordinates (0-1) for position

- left, top, right, bottom - Convert to pixels: multiply by image dimensions

• Element IDs: UUID for chunks, {page}-{base62} for tables and table cells

- Table/cell IDs use sequential base62 numbering per page: 0-1, 0-2,..., 0-9, 0-a,..., 0-z, 0-A,..., 0-Z, 0-10, etc. - Numbering restarts on each page (e.g., first table on page 1 → 1-1)

• Grounding types: Each entry has a type field using prefixed names (e.g., chunkText, chunkTable). See Grounding Type Mapping.
• Table cell position: tableCell entries include a position object with row, col (zero-indexed), rowspan, colspan, and chunk_id (the parent table chunk UUID)
• Extraction metadata: Shows which chunks/cells provided each field

Per-chunk grounding (on each chunk object) contains only box and page. The top-level grounding dictionary adds type and, for table cells, position.

Example:

# Per-chunk grounding (basic location)
for chunk in response.chunks:
    print(f"Chunk {chunk.id} on page {chunk.grounding.page}")
    bbox = chunk.grounding.box
    print(f"Location: ({bbox.left}, {bbox.top}) to ({bbox.right}, {bbox.bottom})")

# Top-level grounding (detailed, with type and position)
# NOTE: grounding values are Pydantic models — use attribute access, not dict access
for elem_id, info in response.grounding.items():
    print(f"{elem_id}: type={info.type}, page={info.page}")
    if info.type == "tableCell" and info.position:
        print(f"  Cell at row={info.position.row}, col={info.position.col}")

Important: response.grounding is a Dict[str, Grounding] — the outer container is a dict (so .items(), .get() work), but each value is a Pydantic model. Use attribute access (info.type, info.box.left) not dict access (info["type"]).

Confidence Scores {#confidence-scores}

Top-level grounding entries may include confidence information:

• confidence (float | None): Overall confidence score (0.0–1.0) for the chunk's transcription
• low_confidence_spans (list | None): Specific text spans with low confidence, each containing:

- confidence (float): Span-level confidence score - text (str): The low-confidence text - span (list): Position markers within the chunk

# Access confidence scores from top-level grounding
for elem_id, info in response.grounding.items():
    if info.confidence is not None:
        print(f"{elem_id}: confidence={info.confidence:.2f}")
    for span in info.low_confidence_spans or []:
        print(f"  Low confidence ({span.confidence:.2f}): "
              f"'{span.text}'")

Notes:

• Confidence is only present in top-level grounding (not per-chunk grounding)
• Not all grounding entries will have confidence (e.g., table/tableCell types may not)
• Use confidence scores to flag chunks that may need human review

Best Practices

Model Selection

• Use dpt-2-latest for most documents (complex layouts, logos, signatures)
• Use dpt-2-mini for simple, digitally-native documents (faster, cheaper)
• Pin versions in production for reproducibility (e.g., dpt-2-20260302)
• Use extract-latest for extraction (automatically uses newest model)
• Do NOT use dpt-1 — deprecated March 31, 2026; migrate to dpt-2

Schema Design

• Be specific: Use descriptive field names (invoice_number not number)
• Add descriptions: Include format requirements ("in USD", "as YYYY-MM-DD")
• Keep it simple: Start with few fields, add more as needed
• Limit complexity: Under 30 properties for optimal performance
• Match document structure: Order fields as they appear in document

For detailed schema patterns, see references/extraction-schemas.md

Error Handling

try:
    response = client.parse(document=Path("doc.pdf"), model="dpt-2-latest")
except Exception as e:
    print(f"Parse error: {e}")
    # Handle error (check file format, file size, API key, etc.)

try:
    extract_response = client.extract(schema=schema, markdown=response.markdown)
except Exception as e:
    print(f"Extract error: {e}")
    # Handle error (check schema validity, markdown format, etc.)

Handling Partial Results (HTTP 206)

Both Parse and Extract APIs can return HTTP 206 (Partial Content) when processing partially succeeds:

Parse 206: Some pages failed to parse. Check metadata.failed_pages:

response = client.parse(document=Path("doc.pdf"), model="dpt-2-latest")
if response.metadata.failed_pages:
    print(f"Failed pages: {response.metadata.failed_pages}")
    # Remaining pages were parsed successfully

Extract 206: Extraction completed but data doesn't fully match schema. Check metadata.schema_violation_error:

response = client.extract(schema=schema, markdown=markdown)
err = response.metadata.schema_violation_error
if err:
    print(f"Schema violation: {err}")
    # Extraction still returns partial data; credits are consumed

Note: 206 responses still consume credits. The API returns the best results it could produce.

Performance

• Large files: Use Parse Jobs API (async) for files > 50 pages or > 10 MB
• Batch processing: Process documents in parallel when possible
• Cache parse results: Save markdown to avoid re-parsing for multiple extractions
• Optimize parsing: Use the split="page" parameter when you need page-level organization

File Formats

• Prefer PDF for native documents (no conversion needed)
• Use high-resolution images (300+ DPI) for better OCR
• Password-protected files: Use the password parameter (requires ZDR). Without ZDR, remove password protection before parsing
• Test conversion for DOCX/PPTX files (layout may change)

For complete file format reference, see references/file-formats.md

Use Cases

See references/use-cases.md for complete worked examples: invoice processing, form data extraction, multi-document classification, table extraction, and figure cropping with PyMuPDF.

Troubleshooting

See references/troubleshooting.md for HTTP error codes, parse failures, extraction accuracy issues, schema validation errors, and performance guidance.

Links

Official Documentation

• LandingAI ADE Documentation
• Parse API Reference
• Extract API Reference
• Split API Reference
• Python Library (GitHub)

API Key

• Get API Key

Reference Files

• Extraction Schema Patterns - Detailed schema examples
• Chunk Types Reference - Complete chunk type guide
• File Formats - Supported formats and considerations
• Use Cases - Worked examples for invoices, forms, tables, and figure extraction
• Troubleshooting - HTTP error codes and common issues