What the Data for This Category Looks Like
The data sources for railway and highway intelligent due diligence reports fall into three main categories: engineering completion archives, road administration operation and maintenance logs, and official line technical specifications. Two data update rhythms apply: line completion data is statically archived, and operation and maintenance data is updated monthly or quarterly. A single document typically includes five sections: basic project information, section breakdown details, technical parameter tables, along-line facility lists, and maintenance record batches. Exclusive fields include main line mileage, track bed thickness, and level crossing count, with corresponding units of kilometers, centimeters, and crossings respectively.
Constraints Imposed on Citation Sources and Traceability by These Characteristics
Mixed data types for railway and highway intelligent due diligence require traceability links to mark data collection times. This prevents citing expired operation and maintenance records. Multi-section split document structures require traceability to link to original content blocks for specific sections. Without this, accurate due diligence verification is not supported. Precise professional technical fields require retaining original field names and units during traceability. Random expression changes will invalidate traceability information. Long technical parameter paragraphs require balancing logical integrity when splitting. Splitting will break associative relationships between parameters if not done carefully.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
maxRecallCount | 120–180 items | Railway and highway due diligence data has multiple document batches per project. Split block counts per document are high. This range prevents recall content from overflowing the context window. |
chunkSize | 800–1200 characters | Railway and highway technical documents include long parameter descriptions. Overly long segments lose field associations. Overly short segments break technical logic integrity. |
sourceTagEnable | Enabled | Retain original document archive numbers and section numbers as traceability identifiers. This matches traceability requirements for compliant railway and highway due diligence. |
recallThreshold | 0.72–0.85 | Railway and highway technical parameter descriptions are precise. High similarity thresholds prevent recalling irrelevant section data. |
contextWindowLimit | 16000–24000 characters | Total reference block length for a single due diligence report is long. This range supports context carrying for multiple professional parameter blocks. |
fileParseMetadataExtract | Enabled | Automatically extract document release dates and project numbers as traceability metadata. This matches time compliance requirements for due diligence reports. |
The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material form, data volume, and business rules. Specific issues require specific analysis, and it is recommended to test on your own samples before finalizing.
Three Common Configuration Mistakes
- Phenomenon: The number of context items displayed on the page does not match the number of reference items sent to the inference interface. For example, the interface shows 30 items but sends 310 items. Cause: The system does not correctly configure linkage verification between
maxRecallCountandcontextWindowLimit. It pulls content based on the recall upper limit but does not truncate to the window limit, leading to inconsistent item counts. - Phenomenon:
maxRecallCountis set to 1500, but blocks longer than 1500 characters in the knowledge base are still recalled. Cause: The system does not enable block length filtering configuration, or the configured block length threshold is not bound tomaxRecallCount. The system only limits item counts, not single block length. - Phenomenon: Cited traceability information only shows the document name, not the section number or archive number. Cause: The system does not enable the
sourceTagEnableconfiguration, or does not enable metadata extraction during document parsing. This prevents capture of exclusive identification fields for railway and highway projects.
How to Confirm Proper Configuration
- View knowledge base-parsed block metadata. Confirm each block includes exclusive traceability fields such as project number, section number, and document release date.
- Trigger a due diligence report generation. Check inference interface request logs. Verify that the number of reference blocks matches the
maxRecallCountsetting value. - Check the reference list at the end of the generated report. Confirm each reference marks the original document’s archive number and collection time.
- Simulate a call with a reference combination exceeding the
contextWindowLimitlength. Confirm the system automatically truncates excess reference blocks.
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.