Ocean Protocol has a convenient marketplace, called the Ocean Market, for publishers and consumers of data. What data, you ask? This data spans anything from .`CSVs` and .`XLSX` files to images, audio, videos, algorithms in any language, or combinations of all these things! There is no exhaustive list of what type of data can be published on the Ocean Market.
The publishing process on the Ocean Market both mints (i.e. creates) a [data NFT](../developers/contracts/data-nfts.md) and a corresponding [datatoken](../developers/contracts/datatokens.md) for your IP. The data NFT stores your IP, and the datatoken controls access to it. If you publish your music IP on the Ocean Market, for example, then a data NFT containing your music and its datatoken are minted during the publishing process. When consumers purchase the datatoken, then they gain access to download/use your data NFT's music.
Description of the asset. Ocean Marketplace **supports Markdown** and plain text formats for the description field. Feel free to enrich your NFT's description with GIFs, videos, images, etc! This field is editable after the asset publication.
An asset can be either a downloadable file or a compute job on a dataset which buyers can run their algorithm. Through **download**, buyers will be able to download the data in the NFT. Through **compute**, buyers will be able to purchase a compute job on a dataset to see an output feed (see Compute-to-Data).
The direct URL to the data. **Provider** encrypts this field before publishing the asset on-chain to hide the source of the data. The direct URL to the file needs to be **publicly accessible** so that the file can be downloaded by buyers (data hosted behind firewalls will not work!). If the file is hosted on services like Google Drive, then the URL needs to point directly to the data asset file. Also, the file needs to have the proper permissions to be downloaded by anybody.
An optional field where publishers can provide a URL to a sample file of the data. Including a sample file helps to persuade buyers that the data is in a suitable format for their needs. The buyers can access it before buying the dataset. This field is editable after the asset publication.
The publisher needs to choose a pricing option - fixed or free - for the asset before publishing the data asset. The pricing schema is not editable after the asset publication.
* **Python:** Are you looking at how to publish a data NFT using Python? Follow the ocean.py [Publish Flow](../data-science/ocean.py/publish-flow.md) to mint a data NFT and datatoken using Python.
* **Javascript**: Are you looking at how to publish a data NFT using Javascript? Follow the ocean.js [Publish Flow](../developers/ocean.js/publish.md) to mint a data NFT and datatoken using Javascript.
Your data or algorithm NFT is \*published\* on-chain once you complete the flow. However, you are not selling the actual NFT on-chain - **you are selling datatokens** that give buyers **access** to the NFT's data. More on this distinction in the Ocean Basics video tutorial.
**Note:** Ocean Protocol maintains a purgatory list [here](https://github.com/oceanprotocol/list-purgatory) to block addresses and remove assets for any violations.
