What the data for this category looks like
The data for building construction intelligent due diligence reports is primarily sourced from construction permits, bidding documents, construction logs, material test reports, as-built survey drawings, and acceptance archives filed with housing and urban-rural development authorities. Data updates align with construction milestones: updates are triggered during project initiation, main construction, and completion phases. After final archiving, updates switch to monthly synchronization.
The document structure mixes structured fields and attachments. Structured fields include project number, floor area (unit: square meters), project cost (unit: ten thousand yuan), start and completion dates, supervision unit qualification number, and similar items. Attachments are mostly PDF scans or editable documents, with individual files up to approximately 2 gigabytes in size.
What constraints these characteristics impose on HTTP interfaces and external systems
The multi-type data characteristics of building construction due diligence reports impose clear constraints on interface and external system integration. First, the scenario of mixed structured fields and large PDF attachments requires interfaces to support multiple parameter type transmissions, while also configuring file size limits and timeout thresholds to adapt to large file parsing. Second, the incremental update requirement based on construction milestones requires interfaces to support timestamp-based incremental synchronization, avoiding excessive bandwidth usage from full pulls. Third, structured fields with specific units such as square meters and ten thousand yuan require interfaces to retain field unit verification logic, preventing parsing errors caused by external systems passing in mismatched unit values. Finally, construction PDFs may contain scanned layers, requiring interfaces to support specified parsing modes to extract structured information.
How to Set Configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
UPLOAD_FILE_MAX_SIZE | 2000 MB | Large single files such as building construction as-built survey drawings and complete construction log PDFs require adaptation for large file uploads |
PARSE_FILE_TIMEOUT_SECONDS | 1200 seconds | Parsing long construction PDF documents takes significant time, preventing parsing interruptions due to timeout |
max_tokens | 16384 | Building construction due diligence report content has significant length, requiring adaptation for large context dialogue processing |
RECALL_CHUNK_SIZE | 800–1200 characters | Structured fields and paragraph information for building construction projects are densely distributed, matching this length improves recall accuracy |
ENABLE_INCREMENTAL_SYNC | Enabled | Building construction project data is updated in batches based on construction milestones, incremental synchronization reduces data transfer load for external systems |
API_ALLOW_ORIGINS | Specify frontend deployment domain names | Restrict cross-origin request sources to secure interface calls |
The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material format, data volume, and business rules. Specific issues require individual analysis, and it is recommended to test against your own samples before finalizing settings.
Three Common Mistakes
- Calling the
/api/v1/chat/completionsinterface returns empty results or format errors. The cause is failure to correctly configure themessagesfield in request parameters or carry valid prompt parameters, preventing the model from generating valid analysis content. - Direct frontend interface calls return a
403 Forbiddenstatus code. The cause is failure to configureAPI_ALLOW_ORIGINSto allow the corresponding frontend domain name, or failure to carry a valid API key in the request header for authentication. - Parsing results lack structured fields after uploading construction PDF files. The cause is failure to enable the
ENABLE_PDF_STRUCTURE_PARSEconfiguration item, or failure to specify a parsing mode for construction documents, resulting in only plain text content being extracted.
How to Confirm Configurations Are Correct
- Call the
/api/v1/modelsinterface, check that the returned model list includes the dedicated model adapted for building construction intelligent due diligence reports. - Upload a single PDF file matching the category characteristics, call the parsing interface, confirm that the returned result includes structured fields and corresponding unit information.
- Call the incremental synchronization interface, pass in the last synchronization timestamp, confirm that only project data updated after that timestamp is returned.
- Call
/api/v1/chat/completionswith a valid API key and correctmessagesparameter, confirm that returned content meets due diligence report analysis requirements.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.