# InterPlanetary Linked Data

InterPlanetary Linked Data (IPLD) is the data layer for content-addressed systems and the Web 3.0. It is a suite of technologies for representing and traversing hash-linked data. In this module you’ll understand:

- Why IPLD exists
- Merkle DAGs and Merkle Roots
- The relation of IPLD to IPFS
- How to use IPLD for a distributed data structure

### Relevant Links

- → [Open Problem on Hash-Linked Data Graph Layouts](https://github.com/protocol/ResNetLab/blob/master/OPEN_PROBLEMS/HASH_LINKED_DATA_GRAPH_LAYOUTS.md)
- → [IPLD docs](https://docs.ipld.io/)
- → [ProtoSchool Tutorial on IPLD](https://proto.school/course/ipld)

### Links

[PDF Slides](https://www.slideshare.net/IoannisPsaras/module-interplanetary-linked-data-ipld)

[Google Slides](https://docs.google.com/presentation/d/1-ZscY84fI_gncQn6H3IOLnL8Icr06a9aun8dgvKUGtM/edit?usp=sharing)