Add collections topic

content/concepts/tokens/nft-collections.md

@@ -0,0 +1,18 @@
+---
+html: nft-collections.html
+parent: non-fungible-tokens.html
+blurb: You can mint NFTs as collections using the NFT Taxon field.
+labels:
+ - Non-fungible Tokens, NFTs
+---
+
+# Minting NFTs into Collections
+
+You can use the `NFTokenTaxon` field to group NFTs into collections. As the minter, you can choose any numeric value from `0x0` to `0xFFFFFFFF`and assign it to NFTs as you create them. The significance of the taxon is entirely up to you.
+
+For example, for your first collection, you might set the `NFTokenTaxon` to `1`. You might have a collection of NFTs with taxon values of `316`, `420`, or `911`. You might use taxons that start with a digit to indicate the type of NFT (for example, all Real Estate NFTs have a taxon that starts with `2`).
+
+While the `NFTokenTaxon` field is required, you can set the value to `0` if you don't intend to create a collection.
+
+See [NFTokenTaxon](nftoken.html#nftokentaxon).
+

content/references/protocol-reference/data-types/nftoken.md

@@ -98,14 +98,15 @@ The fourth section is a `NFTokenTaxon` created by the issuer.
 
 An issuer might issue several `NFToken` objects with the same `NFTokenTaxon`; to ensure that `NFToken` objects are spread across multiple pages, the `NFTokenTaxon` is scrambled using the fifth section, a sequential number, as the seed for a random number generator. The scrambled value is stored with the `NFToken`, but the unscrambled value is the actual `NFTokenTaxon`.
 
-![Dumb Sequential](img/nftokene.png "Dumb Sequential")
+Notice that the scrambled version of the `NFTokenTaxon` is `0xBC8B858E`, the scrambled version of the `NFTokenTaxon` specified by the issuer. But the _actual_ value of the `NFTokenTaxon` is the unscrambled value.
-
-Notice that the scrambled version of the `NFTokenTaxon` is `0xBC8B858E`: the scrambled version of the `NFTokenTaxon` specified by the issuer. But the _actual_ value of the `NFTokenTaxon` is the unscrambled value.
 
 ### Token Sequence
 
-The fifth section is a sequence number that increases with each `NFToken` the issuer creates. The [NFTokenMint transaction][] sets this part of the `NFTokenID` automatically based on the `MintedTokens` field of the `Issuer` account. If the issuer's [AccountRoot object][] does not have a `MintedTokens` field, the field is assumed to have the value 0; the value of the field is then incremented by exactly 1.
+The fifth section is a sequence number that increases with each `NFToken` the issuer creates.
 
+![Sequence Number](img/nftokene.png "Sequence Number")
+
+The [NFTokenMint transaction][] sets this part of the `NFTokenID` automatically based on the `MintedTokens` field of the `Issuer` account. If the issuer's [AccountRoot object][] does not have a `MintedTokens` field, the field is assumed to have the value 0; the value of the field is then incremented by exactly 1.
 
 ## URI
 

dactyl-config.yml

@@ -795,6 +795,11 @@ pages:
             - en
             - ja
 
+    -   md: concepts/tokens/nft-collections.md
+        targets:
+            - en
+            - ja
+
     -   md: concepts/tokens/freezes.md
         targets:
             - en