Help in clarifying confusion with Merkledag and IPLD

I have been coming across information about Merkledags and IPLDS that seems conflicting or overlapping.

When I first started looking into IPFS I quickly learnt about Merkle trees and how IPFS uses a slight modification of that…instead of trees, we have DAGs, hence the Merkledag. The link about Merkledag on the documentation here basically presented it as the underlying data structure of IPFS.

I think I recently came across a section of the docs (and for the life of me I can’t find the link) where it was stated that Merkledag are being deprecated in favour of IPLD. But even without finding a reference to that claim, the first texts on the IPLD website here states that IPLD is the data model of the content-addressable web - but is that what the Markledag is supposed to be?

I will appreciate if someone knowledgeable about these concepts can help clarify and disambiguate between Markledags and IPLD and how they fit into IPFS.

Thanks :slight_smile:

Would I be correct to say IPLD is still a Markledag? But Markledag with more structure? By more structure, I mean there is specification about what data the nodes in the dag should look like, how the links should look like etc?

IPLD is just an specification for Merkle-DAGs which allows to abstract many types of merkle dags and work with them. You may have seen that certain ipfs-merkledag-specific type is getting abstracted with IPLD, but as such, Merkle-DAGs remain.