Add slices to table

README.md

@@ -423,15 +423,16 @@ Selector syntax is closely based on [jq]'s "filters". They operate on an [Invoca
 
 Selectors MUST only include the following features:
 
-| Selector Name             | Examples                   | Notes                                                                                           |
-|---------------------------|----------------------------|-------------------------------------------------------------------------------------------------|
-| Identity                  | `.`                        | Take the entire argument                                                                        |
-| Dotted field name         | `.foo`, `.bar0_`           | Shorthand for selecting in a map by key (with exceptions, see below)                            |
-| Unambiguous field name    | `["."]`, `["$_*"]`         | Select in a map by arbitrary key                                                                |
-| Collection values         | `[]`                       | Expands out all of the children that match the remaining path FIXME double check with the code  |
-| Collection index          | `[0]`, `[42]`              | The element at an index. On a map, this is decided by IPLD's key sort order. FIXME double check |
-| Collection negative index | `[-1]`, `[-42]`            | The element by index from the end. `-1` is the index for the last element.                      |
-| Try                       | `.foo?`, `["nope"]?` | Returns `null` on what would otherwise fail                                                     |
+| Selector Name             | Examples                            | Notes                                                                                           |
+|---------------------------|-------------------------------------|-------------------------------------------------------------------------------------------------|
+| Identity                  | `.`                                 | Take the entire argument                                                                        |
+| Dotted field name         | `.foo`, `.bar0_`                    | Shorthand for selecting in a map by key (with exceptions, see below)                            |
+| Unambiguous field name    | `["."]`, `["$_*"]`                  | Select in a map by arbitrary key                                                                |
+| Collection values         | `[]`                                | Expands out all of the children that match the remaining path FIXME double check with the code  |
+| Collection index          | `[0]`, `[42]`                       | The element at an index. On a map, this is decided by IPLD's key sort order. FIXME double check |
+| Collection negative index | `[-1]`, `[-42]`                     | The element by index from the end. `-1` is the index for the last element.                      |
+| Collection slices         | `[7:11]`, `[2:]`, `[:42]`, `[0:-2]` | The range of elements by their indices.                                                         |
+| Optional                  | `.foo?`, `["nope"]?`                | Returns `null` on what would otherwise fail                                                     |
 
 Any selection MAY begin and/or end with a single dot. Multiple dots (e.g. `..`, `...`) MUST NOT be used anywhere in a selector.