# 15-2 Reference Data :

<mark style="color:purple;">**Large-Scaled, Frequently-Generated Data**</mark>

Data on DonaBlock corresponding to personal information, rich contents for products and deals(images, video clips, and text), frequently generated user behavior records, etc., are stored on separate distributed repositories such as IPFS or PaaS. (Reference Data) Such additional information can be categorized into merchandise information, customer information, and detail contents data.

Reference Data of each deal is hashed to be linked to respective core data. This enables efficient blockchain network transaction for better user experiences.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wpen.donablock.io/15.-donablock-data-architecture/15-2-reference-data.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.