Source Data Characteristics
Residential construction project marketing documents primarily come from project tenders, construction plans, building material quotation sheets, project brochures, and completion reports. Document update schedules align with project progress. Updates trigger when winning a bid, launching new materials, or adjusting plans. Most documents follow a fixed chapter structure, including modules such as project overview, building material list, construction schedule, and qualification documents. Fields in the documents often use engineering-specific units, such as floor area (㎡), project cost (ten thousand yuan), steel bar specification (φ10), and construction days (days). Some documents include both plain text promotional copy and structured parameter content.
Constraints for Parsing and Chunking
Residential construction project documents come from multiple sources, so the parsing module must support PDF, DOCX, and scanned formats to avoid missing text and structured data across different formats. Fixed chapter structures require the chunking process to preserve chapter hierarchy associations, preventing damage to contextual logic after splitting. Structured fields with units require the parsing process to accurately extract the binding relationship between parameters and units, avoiding issues where parameters and units are separated during retrieval. A high proportion of long documents requires chunk length to adapt to long sentences and parameter combinations, preventing loss of critical information associations after splitting. Irregular update cycles require support for incremental upload and incremental parsing, to adapt to document update needs during project progress.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
UPLOAD_FILE_MAX_SIZE | 2000 MB | Single residential construction tender or construction plan documents often exceed 100 MB. 2000 MB covers upload requirements for most large project documents |
PARSE_FILE_TIMEOUT_SECONDS | 1200 seconds | Long document parsing requires significant time. 1200 seconds prevents mid-parsing timeouts for large tenders, completion reports, and similar documents |
Chunk size | 800–1200 characters | Residential construction documents contain a large number of long sentences and structured parameter combinations. This range balances contextual integrity and retrieval granularity |
Section Title Retention | Enabled | Residential construction documents have clear chapter structures. Retaining titles improves contextual relevance during retrieval, preventing chunked content from being separated from chapter logic |
extract_structured_fields | Enabled | Documents include structured fields such as building material specifications and project costs. Extracting these fields enhances retrieval accuracy by using them as auxiliary matching data |
PARSE_PDF_USE_OCR | Enabled only for scanned documents | Most residential construction documents are editable PDFs. OCR increases parsing time, so this configuration should only be enabled for scanned document scenarios |
The parameter values provided on this page are common starting points for configuration setup. Actual values are affected by material format, data volume, and business rules. Specific issues require case-by-case analysis, and it is recommended to test on your own samples before finalizing settings.
Three Common Misconfiguration Scenarios
- Issue: After uploading a DOCX-format residential construction marketing document, the chapter title field in the parsing result is empty. Cause: The
Section Title Retentionconfiguration item is not enabled, so the built-in chapter hierarchy information of the document is not extracted during parsing. - Issue: Knowledge base retrieval results only contain core text, and do not associate structured parameters such as building material specifications and project costs. Cause: The
extract_structured_fieldsconfiguration item is not enabled, so structured fields are not included in chunked content as auxiliary matching data. - Issue: A 504 timeout error is returned when calling the PDF parsing interface. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted, and the parsing time of long residential construction documents exceeds the default threshold.
How to Verify Correct Configuration
- Upload a single large residential construction marketing document, confirm that the upload and parsing process has no timeout or error prompts.
- Open the parsed document details page, check whether the chunked content includes the chapter title identifier for its corresponding section.
- Search for building material specification keywords in the document, confirm that returned results include parameters and matching engineering unit information.
- Upload a scanned residential construction PDF document, confirm that the parsing result has no garbled characters and covers all visible text content.
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.