# Data

## Data Types

### `HashURI`

```
scalar HashURI
```

* support [IPFS CID standard](https://docs.ipfs.io/guides/concepts/cid/)
* support [URDNA2015](https://json-ld.github.io/normalization/spec/) RDF graph normalization hashes
* DRGCA2019 (Directed RDF Graph Canonicalization Algorithm 2019): TODO

## Transactions

```
tx AnchorData(iri HashURI)
```

### Registering URL's for Anchored Data

```
tx RegisterDataURL(iri HashURI, urls URL*)
```

## Signing Data

```
tx SignData(iri HashURI)
```

## State

```
table DataTimestamp {
  uri: HashURI
  timestamp: DateTime
  @primary_key(uri)
}

table DataURL {
  uri: HashURI
  url: URL
  @primary_key(uri, url)
}

table DataSigner {
  uri: HashURI
  signer: Address
  timestamp: DateTime
  @primary_key(uri, signer)
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://aaronc.gitbook.io/regen-docs/draft/data.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.