What Data for This Category Looks Like
Civil aviation airport declaration materials and case review data comes from official submission documents required by civil aviation regional administrations, including airport expansion, flight schedule application, safety inspection documents, and internal airport operation cases. Update rhythm adjusts based on project progress or regulatory requirements, with no unified fixed cycle. Most documents are multi-chapter nested PDF formats. They include civil aviation-specific tables such as runway parameters, flight schedule ledgers, and safety inspection checklists, long-text approval paragraphs, and scanned attachments. Fields include project number, airport ICAO code, approval status, and rectification item list. Units mostly use civil aviation general measurement standards such as meters, passenger trips, and tons.
What Constraints These Characteristics Impose on Document Parsing and Chunking
The multi-chapter nested structure of civil aviation declaration materials requires chunk boundaries to match chapter logic. This avoids splitting continuous content linked to approval processes. A large number of civil aviation-specific tables in documents can cause column misalignment and field splitting errors with default character-based chunking. This affects subsequent retrieval accuracy. Some cases include scanned PDF attachments. Plain text parsing cannot extract structured table fields, so custom parsing services are required. The length of different case types varies greatly, from dozens of pages of daily safety cases to hundreds of pages of infrastructure declaration materials. Adaptation to different chunking and parsing durations is needed.
How to Configure Settings
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to the reasonable length of long paragraphs and split tables in civil aviation declaration materials, avoiding splitting content related to approval processes |
chunkSplitter | Split by paragraph + table boundaries | Matches the multi-chapter, multi-table structure of documents, reducing the risk of table misalignment |
customPdfParse | Enabled | Calls custom parsing services to extract structured fields for scanned PDFs and complex tables in civil aviation declaration materials |
PARSE_FILE_TIMEOUT_SECONDS | 120–180 seconds | Adapts to the parsing duration of large airport infrastructure declaration cases, avoiding timeout interruptions |
UPLOAD_FILE_MAX_SIZE | 500 MB | Meets the upload requirements of single large infrastructure declaration cases |
chunkSettingMode | Manual configuration | Adjusts chunking parameters for different types of cases, such as flight schedule application and safety inspection cases, to adapt to specific scenarios |
Three Common Configuration Mistakes
- Parsed tables have column misalignment and incomplete field display. The cause is failing to configure the chunking rule based on paragraph + table boundaries. Using default character-based chunking splits tables into multiple unrelated fragments.
- Parsing fails with a status code after uploading large declaration cases. The cause is failing to adjust
PARSE_FILE_TIMEOUT_SECONDSto a duration suitable for large documents, or failing to enablecustomPdfParseto handle complex format files. - Custom parsing service calls time out and tasks are forcibly terminated. The cause is failing to set
PARSE_FILE_TIMEOUT_SECONDSto a duration that meets the parsing requirements of civil aviation large cases, resulting in interruptions before parsing is completed.
How to Confirm Configuration Is Complete
- Upload a test PDF containing civil aviation-specific tables. Check if tables in the parsed result are fully aligned with no field splitting errors.
- Go to the system configuration page of FastGPT v4.17.0. Confirm that
customPdfParseis enabled andPARSE_FILE_TIMEOUT_SECONDSis set to 120–180 seconds. - Upload a single airport safety inspection case not exceeding 500 MB. Confirm that the upload and parsing process is not interrupted, and the generated chunk fragments match the document chapter logic.
- For flight schedule application documents, adjust the
chunkSizeparameter. Verify that the chunk fragments fully contain all content of a single flight schedule application.
The values provided are common starting points and should be measured against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.