feat(dataverse): specify AttachMetadata execute message

contracts/okp4-dataverse/README.md

@@ -2,7 +2,9 @@
 
 ## Overview
 
-The `dataverse smart contract is responsible for overseeing and managing the dataverse. The Dataverse is an ever-expanding universe that encompasses a wide range of digital resources. These include datasets, data processing algorithms, storage resources, computational resources, identity management solutions, orchestration engines, oracles, and many other resources recorded on the blockchain. Within the Dataverse, there are defined Zones where specific rules apply. Digital resources recognized within these Zones are the ones compatible with these rules, considering the associated consents. Hence the smart contract also provides mechanisms to manage these Zones, ensuring the implementation of precise governance rules.
+The `dataverse` smart contract is responsible for overseeing and managing the dataverse. The Dataverse is an ever-expanding universe that encompasses a wide range of digital resources. These include datasets, data processing algorithms, storage resources, computational resources, identity management solutions, orchestration engines, oracles, and many other resources recorded on the blockchain. Within the Dataverse, there are defined Zones where specific rules apply. 
+
+Digital resources recognized within these Zones are the ones compatible with these rules, considering the associated consents. Hence the smart contract also provides mechanisms to manage these Zones, ensuring the implementation of precise governance rules.
 
 ## Instances
 

contracts/okp4-dataverse/src/msg.rs

@@ -1,4 +1,5 @@
 use cosmwasm_schema::{cw_serde, QueryResponses};
+use cosmwasm_std::Binary;
 #[allow(unused_imports)]
 use okp4_logic_bindings::AskResponse;
 
@@ -79,6 +80,7 @@ pub enum ExecuteMsg {
         registrar: URI,
     },
 
+    /// # FoundZone
     /// Founds a new zone within the dataverse.
     ///
     /// `Zone` is a conceptual framework that is established based on a set of rules, within which recognized digital Resources must conform, considering
@@ -98,7 +100,63 @@ pub enum ExecuteMsg {
 
         /// The URI of the entity responsible for registering and managing the zone.
         registrar: URI,
-    }
+    },
+
+    /// # AttachMetadata
+    /// Attaches metadata to a specified resource registered in the dataverse.
+    ///
+    /// Metadata provides additional information or details about a resource.
+    AttachMetadata {
+        /// The RDF identifier of the resource for which the metadata should be attached.
+        resource_identifier: URI,
+
+        /// RDF format in which the metadata is represented.
+        /// If not provided, the default format is [Turtle](https://www.w3.org/TR/turtle/) format.
+        format: Option<RDFFormat>,
+
+        /// The serialized metadata intended for attachment.
+        /// This metadata should adhere to the format specified in the `format` field.
+        metadata: Binary,
+    },
+}
+
+/// # RDFFormat
+/// `RDFFormat` represents the various serialization formats for RDF (Resource Description Framework) data.
+#[cw_serde]
+#[derive(Default)]
+pub enum RDFFormat {
+    /// # RDFXml
+    /// RDF/XML Format
+    ///
+    /// RDF/XML is a syntax to express RDF information in XML.
+    /// See the [official RDF/XML specification](https://www.w3.org/TR/rdf-syntax-grammar/).
+    #[serde(rename = "rdf_xml")]
+    RDFXml,
+
+    /// # Turtle
+    /// Turtle (Terse RDF Triple Language) Format
+    ///
+    /// Turtle is a textual format for representing RDF triples in a more compact and human-readable way compared to RDF/XML.
+    /// See the [official Turtle specification](https://www.w3.org/TR/turtle/).
+    #[serde(rename = "turtle")]
+    #[default]
+    Turtle,
+
+    /// # NTriples
+    /// N-Triples Format
+    ///
+    /// N-Triples is a line-based, plain text format for encoding an RDF graph. Each line corresponds to a single RDF triple.
+    /// See the [official N-Triples specification](https://www.w3.org/TR/n-triples/).
+    #[serde(rename = "n_triples")]
+    NTriples,
+
+    /// # NQuads
+    /// N-Quads Format
+    ///
+    /// N-Quads is an extension of N-Triples to support RDF datasets by adding an optional fourth element to represent the graph name.
+    /// See the [official N-Quads specification](https://www.w3.org/TR/n-quads/).
+    #[serde(rename = "n_quads")]
+    NQuads,
 }
 
 /// `QueryMsg` defines the set of possible queries that can be made to retrieve information about the dataverse.