# Transaction Schema

**URL:** <https://forum.cardano.org/t/transaction-schema/28267>\
**Category:** General Discussions\
**Created:** [13 November 2019 10:53 UTC](https://forum.cardano.org/t/transaction-schema/28267 "2019-11-13T10:53:06Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![phil.lewis](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/phil.lewis/32/9101_2.png) [@phil.lewis](https://forum.cardano.org/u/phil.lewis)\
**Post date:** [13 November 2019 10:53 UTC](https://forum.cardano.org/t/transaction-schema/28267/1 "2019-11-13T10:53:06Z")

</div>

So I originally posed this question in a different post discussing the New Balance coloured coins

> [@Colored Coins - How does it work and are they transferrable? Will Newbalance be locking up the coins they color for thier product?](https://forum.cardano.org/t/colored-coins-how-does-it-work-and-are-they-transferrable-will-newbalance-be-locking-up-the-coins-they-color-for-thier-product/27899/5):
>
> So, if a block is a collection of transactions, which are collectively hashed to chain to the next block and a transaction contains a timestamp, input, output and amount, where does the “colour” information live? Is it another field or part of an existing field?
> 
> Is there any documentation anywhere that shows the schema of a Cardano transaction?

but didn’t get a response, so thought I would ask it separately.

Can anyone point me to some (presumably IOHK) documentation that describes what information is stored in a transaction and how the additional data stored to “colour” a coin can be accessed? I am also interested to know what capacity this (or any other) additional field in a transaction can hold.

---

<div class="post-metadata">

**Author:** ![phil.lewis](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/phil.lewis/32/9101_2.png) [@phil.lewis](https://forum.cardano.org/u/phil.lewis)\
**Post date:** [16 November 2019 14:39 UTC](https://forum.cardano.org/t/transaction-schema/28267/2 "2019-11-16T14:39:49Z")

</div>

Wow, I think I can actually hear crickets. Was it something I said 🙂

---

<div class="post-metadata">

**Author:** ![RobJF](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.cardano.org/robjf/32/8069_2.png) [@RobJF](https://forum.cardano.org/u/RobJF)\
**Post date:** [16 November 2019 14:43 UTC](https://forum.cardano.org/t/transaction-schema/28267/3 "2019-11-16T14:43:40Z")

</div>

Well as a last resort there’s always the code… 😀