What this category of data looks like
Data for this category comes from engineering construction project approval management systems, construction drawing review systems, enterprise qualification databases, and credit platforms. Updates occur daily. Processed documents include standard materials such as construction permit applications, construction drawing review qualification certificates, quality and safety supervision procedures, and completion record forms. The data structure mostly combines structured forms and compliance text. Fields cover project identifiers, participating entity qualifications, approval node records, and other related content. There is no uniform proportion of unstructured free text.
Constraints on document parsing and chunking
Multiple system sources for this category’s data lead to differences in document formats. The mixed structure of structured forms and compliance text requires parsing logic to balance field extraction and semantic integrity. Daily updated batch data needs efficient parsing processes to prevent delays that disrupt approval node progress. Standard documents have fixed formatting, so chunking logic must preserve the independence of form fields. Failure to do so will cause semantic breaks in approval basis content. Errors in this step directly affect project construction and record procedures. Parsing and chunking accuracy requirements are therefore high, and critical information loss must be avoided.
How to set configurations
| Configuration Item | Recommended Approach | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Category documents are mostly structured forms and compliance text. This range preserves complete semantics of approval nodes and qualification information |
chunkSplitter | Split by paragraph + title | Category documents include structured content such as construction permits and record forms. Splitting by title preserves independent semantics of approval stages |
customPdfParse | Enabled | This configuration in FastGPT v4.17.0 preserves form fields and image text from official standard PDFs, adapting to the compliance requirements of this category’s documents |
PARSE_FILE_TIMEOUT_SECONDS | 300 seconds | Single approval documents may include multi-page combined materials. This duration covers the full parsing process |
UPLOAD_FILE_MAX_SIZE | 50 MB | Matches the upper limit of approval material packages submitted in a single batch for this category, preventing parsing interruptions |
chunkSettingMode | Manual configuration | Adapts to the large structural differences of this category’s documents, allowing adjustment of chunking rules for different material types |
Three common errors
- Image text fields are empty after parsing. Phenomenon: Returned Q&A results do not include construction drawing description text embedded in PDFs. Cause: The
customPdfParseconfiguration is not enabled, so compliance description text from embedded PDF images cannot be extracted. - Core approval information breaks after chunking. Phenomenon: A single chunk contains both a project number and approval conclusion, and cannot independently serve as a policy basis. Cause: Chunking logic is not adjusted to match the structured formatting rules of this category’s documents.
- Parsing tasks are terminated due to timeout. Phenomenon: The interface displays a parsing failure timeout prompt. Cause:
PARSE_FILE_TIMEOUT_SECONDSis not adjusted. The default short duration cannot handle multi-page combined approval materials.
How to confirm configurations are correctly set
- Upload a single standard PDF approval material. Verify that the parsed text includes all form fields and embedded image text to confirm the
customPdfParseconfiguration is active. - Review the start and end content of chunking results. Verify that chunking preserves the integrity of core information such as approval nodes and participating entity qualifications.
- Submit a multi-page combined material package. Confirm that the task is not blocked by
UPLOAD_FILE_MAX_SIZErestrictions, and that parsing time falls within the range of the presetPARSE_FILE_TIMEOUT_SECONDS. - Test chunking effects for different document types separately, such as construction permit applications and completion record forms. Adjust
chunkSettingModeto adapt to corresponding structures.
The values provided here 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.