---
Number: "0025"
Category: Standards Track
Status: Proposal
Author: Xuejie Xiao <[email protected]>
Created: 2020-09-03
---
# Simple UDT
This RFC defines the Simple User Defined Tokens(Simple UDT or SUDT) specification. Simple UDT provides a way for dapp developers to issue custom tokens on Nervos CKB. The simple part in Simple UDT means we are defining a minimal standard that contains whats absolutely needed, more sophisticated actions are left to CKBs flexibility to achieve.
## Data Structure
### SUDT Cell
A SUDT cell in Simple UDT specification looks like following:
```
data:
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