Add Dynamic NFTs concept and reference

docs/concepts/tokens/nfts/dynamic-nfts.md

@@ -0,0 +1,32 @@
+---
+seo:
+    description: Create NFTs with the option of changing the URI to update its referenced data object.
+labels:
+  - Non-fungible Tokens, NFTs
+---
+
+# Dynamic Non-Fungible Tokens (dNFTs)
+
+Standard NFTs are immutable. Some use cases would benefit from the capability to update the referenced data object after the initial minting of an NFT. For example, a concert ticket for a postponed event could be updated with an alternate date, or a virtual trading card for an athlete could be periodically updated with current statistics. Dynamic Non-Fungible Tokens (dNFTs) provide the flexibility required for these use cases.
+
+## Creating a dNFT
+
+When minting a new NFT, set the `tfMutable` flag (`0x00000010`) to enable the ability to update the NFT's `URI` field.
+
+## Modifying a dNFT
+
+Use the `NFTokenModify` transaction to update the URI field of a dNFT. Provide the `Account` of the issuer or an authorized minter, the `Owner` of the dNFT, the `NFTokenID`, and the `URI` to the new object data.
+
+### Sample NFTokenModify Transaction
+
+```json
+{
+  "TransactionType": "NFTokenModify",
+  "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
+  "Owner": "rogue5HnPRSszD9CWGSUz8UGHMVwSSKF6",
+  "Fee": "10",
+  "Sequence": 33,
+  “NFTokenID”: “0008C350C182B4F213B82CCFA4C6F59AD76F0AFCFBDF04D5A048C0A300000007",
+  "URI": "697066733A2F2F62616679626569636D6E73347A736F6C686C6976346C746D6E356B697062776373637134616C70736D6C6179696970666B73746B736D3472746B652F5665742E706E67",
+  }
+```