Update background.md

background.md

@@ -81,32 +81,32 @@ but we do not allow this because it would mean we would have to take multiple br
 
 What we have now is a tree of dense datacubes which represents a single larger sparse datacube in a more compact manner. For want of a better word we'll call it a Qube.
 
-## API
+## API
 
 Qubed will provide a core compressed tree data structure called a Qube  with:
 
 Methods to convert to and from:
-    - [x] A human readable representation like those seen above.
-    - [x] An HTML version where subtrees can be collapsed.
-    - [ ] An compact protobuf-based binary format
-    - [x] Nested python dictionaries or JSON
-    - [/] The output of [fdb list](https://confluence.ecmwf.int/display/FDB/fdb-list)
-    - [ ] [mars list][mars list]
-    - [ ] [constraints.json][constraints]
+- [x] A human readable representation like those seen above.
+- [x] An HTML version where subtrees can be collapsed.
+- [ ] An compact protobuf-based binary format
+- [x] Nested python dictionaries or JSON
+- [ ] The output of [fdb list](https://confluence.ecmwf.int/display/FDB/fdb-list)
+- [ ] [mars list][mars list]
+- [ ] [constraints.json][constraints]
 
 [constraints]: (https://object-store.os-api.cci2.ecmwf.int/cci2-prod-catalogue/resources/reanalysis-era5-land/constraints_a0ae5b42d67869674e13fba9fd055640bcffc37c24578be1f465d7d5ab2c7ee5.json
 [mars list]: https://git.ecmwf.int/projects/CDS/repos/cads-forms-reanalysis/browse/reanalysis-era5-single-levels/gecko-config/mars.list?at=refs%2Fheads%2Fprod
 
 Useful algorithms:
-    - [x] Compression
-    - [/] Union/Intersection/Difference
+- [x] Compression
+- [ ] Union/Intersection/Difference
 
 Performant Membership Queries
-    - Identifier membership
-    - Datacube query (selection)
+- [x] Identifier membership
+- [x] Datacube queries (selection)
 
 Metadata Storage
-
+- [ ] The ability to store metadata on the tree that is unique per leaf node.