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Model: shaohongwu/Qwen2.5-0.5B-Preweb-special-tokens
Source: Original Platform

README.md

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+
+---
+license: apache-2.0
+
+license_link: https://huggingface.co/Qwen/Qwen2.5-0.5B/blob/main/LICENSE
+language:
+
+    - en
+
+pipeline_tag: text-generation
+
+library_name: transformers
+---
+
+---
+license: apache-2.0
+
+base_model: Qwen/Qwen2.5-0.5B
+
+tags:
+
+    - qwen
+    - schema-aware
+    - structured-output
+    - preweb
+---
+# Qwen2.5-0.5B-Preweb-Base
+
+This model is a **derivative base model** of `Qwen/Qwen2.5-0.5B`.
+
+It extends the tokenizer vocabulary with schema/control special tokens
+
+---
+## 🔧 What’s Changed
+
+Added the following special tokens to the tokenizer:
+
+    - `<|domain_start|>`, `<|domain_end|>`
+    - `<|intent_start|>`, `<|intent_end|>`
+    - `<|slot_type_start|>`, `<|slot_type_end|>`
+    - `<|slot_span_start|>`, `<|slot_span_end|>`
+    - `<|canonical_start|>`, `<|canonical_end|>`
+
+As a result:
+    - Tokenizer vocabulary size is increased.
+---
+
+## 🎯 Intended Usage
+
+This model is intended to be used as a **base model** for:
+
+    - schema-aware prompting
+    - structured information extraction
+    - slot / intent / domain prediction
+
+All downstream **LoRA adapters must be trained with the same tokenizer**.
+
+---
+## 🚫 Compatibility Notes
+    - Vocabulary shapes are **fixed**
+    - Do NOT add or remove tokens at runtime
+    - Designed for **vLLM / TensorRT-LLM** serving
+    - Safe for multi-LoRA dynamic loading
+---
+
+## 📜 License
+
+Apache-2.0
+This model is a derivative work of `Qwen/Qwen2.5-0.5B`.