What the data for this category looks like
Marketing content data for railway and highway scenarios targeting financial, insurance, and wealth management comes primarily from operational departments: route announcements, station promotional materials, customer survey materials, temporary marketing campaign plans, and similar sources. Updates follow no fixed cycle, and are triggered by route adjustments, new station openings, or the launch of marketing campaigns.
Document structures include structured route parameters, short-text campaign copy, long-text station introductions, and a large volume of scanned PDF promotional brochures. Fields include route number, station name, marketing campaign ID, delivery channel, effective end date. Units include kilometers, passenger trips, date formats, and similar categories.
What constraints these characteristics impose on knowledge base retrieval and recall
Mixed data formats from multiple sources include both structured fields and unstructured text, requiring targeted splitting and filtering rules. Marketing content for financial, insurance, and wealth management scenarios has strong timeliness. The effective end date field requires filtering expired content during retrieval to avoid recalling invalid campaign information.
A high proportion of scanned PDFs requires additional OCR recognition workflows. Without these, valid text cannot be extracted for promotion matching. There is a large volume of long-text content, so chunk splitting must adapt to the semantic integrity of route descriptions to avoid context breaks. Irregularly updated data demands a flexible incremental synchronization mechanism to maintain real-time performance for financial, insurance, and wealth management marketing content.
Configuration settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunk_size | 800–1200 characters | Railway and highway marketing content mostly consists of long-text route descriptions and campaign copy. This length preserves semantic integrity |
similarity_threshold | 0.75–0.85 | Marketing content for financial, insurance, and wealth management scenarios requires matching precise keywords. This threshold filters irrelevant basic route information |
enable_ocr | Enabled | A large number of scanned promotional PDFs exist, and text content must be extracted for retrieval matching |
incremental_update_interval | 2:00 AM daily | Marketing content updates have no fixed cycle. Daily incremental synchronization covers temporary adjustments |
filter_field | effective_date | Marketing content has an effective end time, so expired content must be filtered |
recall_top_k | Top 10 entries | Balances content coverage and retrieval efficiency. 10 entries provide sufficient marketing reference materials |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material form, data volume, and business rules. Specific issues require individual analysis, and it is recommended to test on your own samples before finalizing settings.
Three common configuration mistakes
- Phenomenon: Knowledge base search throws the error
invalid configuration parameter name "hnsw.max_scan_tuple". Cause: A parameter name from another vector database was mistakenly added to custom configuration items, and built-in retrieval parameters supported by the platform were not used. - Phenomenon: Knowledge base search takes more than 8 seconds and returns an insufficient number of results. Cause: Reasonable
chunk_sizeandrecall_top_kvalues were not set, leading to too many invalid text blocks being loaded for retrieval. - Phenomenon: No valid text is extracted after parsing scanned railway marketing PDFs. Cause: The
enable_ocrconfiguration was not enabled, or an OCR recognition model adapted to printed text was not configured.
How to confirm the configuration is correct
- Upload a scanned railway marketing promotional PDF, check if the parsed text includes the route and campaign information from the original material, to confirm the OCR configuration is active.
- Initiate a search containing route keywords, check if the effective dates of returned results fall within the current cycle, to confirm the field filtering configuration is active.
- Submit 2-3 related marketing-related questions, check if the returned results match the semantics of each corresponding question separately, to confirm the context isolation configuration for multi-question retrieval is active.
- View retrieval logs, confirm no errors of the type
invalid configuration parameter nameappear, to confirm custom parameter configurations comply with platform 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.