add extra attributes proposed in review

Co-authored-by: Bumblefudge <bumblefudge@learningproof.xyz>

Author: lidel

src/ipips/ipip-0499.md

@@ -27,11 +27,15 @@ We introduce a profile naming system,
 
 Each profile must specify the following characteristics:
 
-1. CID version (CIDv0 or CIDv1)
+1. CID version (currently only CIDv0 or CIDv1)
 2. Hash algorithm
-3. Chunk size
-4. DAG width
-5. DAG layout
+3. UnixFS Chunk size (explicitly set, not contextual/reactive to input)
+4. UnixFS directory DAG width
+5. UnixFS directory DAG layout
+6. HAMT directory DAG threshold
+7. HAMT directory DAG width
+8. Leaf Envelope (historically dag-pb, now none/raw)
+9. Allow empty directories
 6. Required
 
 Additional profiles can be added at a future date. Profile names may be chosen from the names of any botanical tree with compound leaves.
@@ -43,7 +47,10 @@ Additional profiles can be added at a future date. Profile names may be chosen f
 | Chunk size  | 1MiB          | 256KiB                      | 1MiB             | 1MiB                  | not specified |
 | DAG width   | 1024          | 174 (but it's complicated*) | 1024             | 174                   | not specified |
 | DAG layout  | balanced      | balanced                    | balanced         | balanced              | not specified |
-
+| HAMT threshold  |  256KiB (est) | 256KiB (est) | 1000 **links**  | 256KiB  | not specified | 
+| HAMT width        |  256 blocks | 256 blocks | 256 blocks | 256 blocks | not specified | 
+| Leaves                  |  raw | raw | raw | raw | not specified |
+| EmptyDirs            |  allowed | allowed | disallowed | allowed | not specified |
 
 
 This would be specified as a table in (forthcoming UnixFS spec).