diff --git a/book/src/reference/data_dictionary.md b/book/src/reference/data_dictionary.md
index e2287934..aedfee31 100644
--- a/book/src/reference/data_dictionary.md
+++ b/book/src/reference/data_dictionary.md
@@ -10,174 +10,394 @@ The following list represent the already implemented events. These data structur
 
 ### `RollBack` Event
 
-- block_slot: u64,
-- block_hash: String,
+Data on chain rollback(The result of the local node switching to the consensus chains).
+
+| Name         | DataType   | Description                    |
+| :---         | :---       | :---                           |
+| block_slot   | u64        | Slot of the rolled back block. |
+| block_hash   | String     | Hash of the rolled back block. |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `Block` Event
 
-- body_size: usize,
-- issuer_vkey: String,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
+Data on an issued block.
+
+| Name         | DataType   | Description                           |
+| :---         | :---       | :---                                  |
+| body_size    | usize      | Size of the block.                    |
+| issuer_vkey  | String     | Block issuer Public verification key. |
+
+**Context**
+
+| Name         | DataType     | Description                           |
+| :---         | :---         | :---                                  |
+| block_number | Option\<u64> | Height of block from genesis.         |
+| slot         | Option\<u64> | Current slot.                         |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `Transaction` Event
 
-- fee: u64,
-- ttl: Option<u64>,
-- validity_interval_start: Option<u64>,
-- network_id: Option<u32>,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on a transaction.
+
+| Name                    | DataType    | Description                            |
+| :---                    | :---        | :---                                   |
+| fee                     | u64         | Transaction fees in lovelace.          |
+| ttl                     | Option\<u64> | Transaction time to live.              |
+| validity_interval_start | Option\<u64> | Start of transaction validity interval |
+| network_id              | Option\<u32> | Network ID.                            |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `TxInput` Event
 
-- tx_id: String,
-- index: u64,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
-    - input_idx: Option<usize>,
+Data on a transaction input.
+
+| Name         | DataType     | Description                           |
+| :---         | :---         | :---                                  |
+| tx_id        | String       | Transaction ID.                       |
+| index        | u64          | Index of input in transaction inputs. |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+| input_idx    | Option\<usize>  | Input ID.                             |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `TxOutput` Event
 
-- address: String,
-- amount: u64,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
-    - output_idx: Option<usize>,
+Data on a transaction output (UTXO).
+
+| Name         | DataType     | Description                           |
+| :---         | :---         | :---                                  |
+| address      | String       | Address of UTXO.                      |
+| amount       | u64          | Amount of lovelace in UTXO.           |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+| output_idx   | Option\<usize>  | Output ID.                            |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `OutputAsset` Event
 
-- policy: String,
-- asset: String,
-- amount: u64,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
-    - output_idx: Option<usize>,
+Data on a non-ADA asset in a UTXO.
+
+| Name         | DataType     | Description                           |
+| :---         | :---         | :---                                  |
+| policy       | String       | Minting policy of asset.              |
+| asset        | String       | Asset ID.                             |
+| amount       | u64          | Amount of asset.                      |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+| output_idx   | Option\<usize>  | Output ID.                            |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `Metadata` Event
 
-- key: String,
-- subkey: Option<String>,
-- value: Option<String>,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| key          | String          | ....                                  |
+| subkey       | Option\<String> | ....                                  |
+| value        | Option\<String> | ....                                  |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `Mint` Event
 
-- policy: String,
-- asset: String,
-- quantity: i64,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on the minting of a non-ADA asset.
+
+| Name         | DataType     | Description                           |
+| :---         | :---         | :---                                  |
+| policy       | String       | Minting policy of asset.              |
+| asset        | String       | Asset ID.                             |
+| quantity     | i64          | Quantity of asset minted.             |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `Collateral` Event
 
-- tx_id: String,
-- index: u64,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on [collateral inputs](https://docs.cardano.org/plutus/collateral-mechanism).
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| tx_id        | String          | Transaction ID.                       |
+| index        | u64             | Index of transaction input in inputs. |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `PlutusScriptRef` Event
 
-- data: String
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| data         | String          | ....                                  |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `StakeRegistration` Event
 
-- credential: StakeCredential
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on stake registration event.
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| credential   | [StakeCredential](https://docs.rs/oura/1.4.1/oura/model/enum.StakeCredential.html) | Staking credentials.                 |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `StakeDeregistration` Event
 
-- credential: StakeCredential
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on stake deregistration event.
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| credential   | [StakeCredential](https://docs.rs/oura/1.4.1/oura/model/enum.StakeCredential.html) | Staking credentials.                 |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `StakeDelegation` Event
 
-- credential: StakeCredential,
-- pool_hash: String,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on [stake delegation](https://docs.cardano.org/core-concepts/delegation) event.
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| credential   | [StakeCredential](https://docs.rs/oura/1.4.1/oura/model/enum.StakeCredential.html) | Stake credentials.                    |
+| pool_hash    | String          | Hash of stake pool ID.                |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `PoolRegistration` Event
 
-- operator: String,
-- vrf_keyhash: String,
-- pledge: u64,
-- cost: u64,
-- margin: f64,
-- reward_account: String,
-- pool_owners: Vec<String>,
-- relays: Vec<String>,
-- pool_metadata: Option<String>,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on the stake [registration event](https://developers.cardano.org/docs/stake-pool-course/handbook/register-stake-pool-metadata/).
+
+| Name           | DataType        | Description                            |
+| :---           | :---            | :---                                   |
+| operator       | String          | Stake pool operator ID.                |
+| vrf_keyhash    | String          | Kehash of node VRF operational key.    |
+| pledge         | u64             | Stake pool pledge (lovelace).          |
+| cost           | u64             | Operational costs per epoch (lovelace).|
+| margin         | f64             | Operator margin.                       |
+| reward_account | String          | Account to receive stake pool rewards. |
+| pool_owners    | Vec\<String>    | Stake pool owners.                     |
+| relays         | Vec\<String>    | ....                                   |
+| pool_metadata  | Option\<String> | ....                                   |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `PoolRetirement` Event
 
-- pool: String,
-- epoch: u64,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+Data on [stake pool retirement](https://cardano-foundation.gitbook.io/stake-pool-course/stake-pool-guide/stake-pool/retire_stakepool) event.
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| pool         | String          | Pool ID.                              |
+| epoch        | u64             | Current epoch.                        |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `GenesisKeyDelegation` Event
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+
+Data on genesis key delegation.
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Current slot.                         |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |
+
+
+<br />
+<br />
+<hr />
+
 
 ### `MoveInstantaneousRewardsCert` Event
 
-- from_reserves: bool,
-- from_treasury: bool,
-- to_stake_credentials: Option<BTreeMap<StakeCredential, i64>>,
-- to_other_pot: Option<u64>,
-- context:
-    - block_number: Option<u64>,
-    - slot: Option<u64>,
-    - tx_idx: Option<usize>,
-    - tx_hash: Option<String>,
+| Name                 | DataType                                | Description                           |
+| :---                 | :---                                    | :---                                  |
+| from_reserves        | bool                                    | ....                                  |
+| from_treasury        | bool                                    | ....                                  |
+| to_stake_credentials | Option\<BTreeMap<StakeCredential, i64>> | ....                                  |
+| to_other_pot         | Option\<u64>                            | ....                                  |
+
+**Context**
+
+| Name         | DataType        | Description                           |
+| :---         | :---            | :---                                  |
+| block_number | Option\<u64>    | Height of block from genesis.         |
+| slot         | Option\<u64>    | Blockchain slot.                      |
+| tx_idx       | Option\<usize>  | Transaction ID.                       |
+| tx_hash      | Option\<String> | Transaction hash.                     |