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README.md

@@ -39,7 +39,7 @@ tags:
 
 # Library Classification Systems
 
-This comprehensive dataset encompasses hierarchical outlines of five major library classification systems:
+This comprehensive dataset contains hierarchical outlines of five major library classification systems, offering a valuable resource for researchers, librarians, and information scientists.
 
 | Classification System | Abbreviation | Primary Usage | Language | Entries |
 |-----------------------|--------------|----------------|----------|---------|
@@ -51,11 +51,11 @@ This comprehensive dataset encompasses hierarchical outlines of five major libra
 
 **Total Entries:** 23,916
 
-The dataset provides freely-available outlines of these classification systems, which are widely used in libraries and information management systems worldwide. It captures the hierarchical structure and descriptions for each classification, offering a valuable resource for researchers, librarians, and information scientists. However, it's important to note that the full text of the first three classification systems is not included and must be purchased separately from their organizations.
+Note that the full classification systems are much more detailed than presented here. For DDC, LCC, and UDC, they have to be purchased from their organizations.
 
 ## Data Structure
 
-Each instance in the dataset represents a library classification entry. The structure is designed to capture the hierarchical nature of the classification scheme.
+Each instance in the dataset represents a library classification entry.
 
 The data is structured in **JSONL (JSON Lines)** format, with each entry containing the following fields:
 
@@ -76,8 +76,8 @@ The data is structured in **JSONL (JSON Lines)** format, with each entry contain
   "narrower": ["AC1-195", "AC200", "AC801-895", "AC901-995", "AC999"]
 }
 ```
-
-## Dataset Creation
+<details>
+<summary>## Dataset Creation</summary>
 
 On 2024-09-18, publicly available classification outlines were collected from:
 
@@ -98,6 +98,7 @@ Data processing steps:
 3. **UDC**: Parsed `udc-summary.rdf` using RDFlib, retaining only English labels.
 4. **CLC**: Crawled website, including only the first 3 hierarchy levels.
 5. **RVK**: Processed CSV file, keeping only the first 3 hierarchy levels.
+</details>
 
 ## Supported Tasks and Leaderboards