WIP: allow starting with @

draft-ietf-jsonpath-base.md

@@ -449,13 +449,15 @@ return an error.
 
 ## Syntax
 
-Syntactically, a JSONPath consists of a root selector (`$`), which
-selects the root node of a JSON value, followed by a possibly empty
-sequence of *selectors*.
+Syntactically, a JSONPath consists of either a root selector (`$`), which
+selects the root node of a JSON value, or a current item selector (`@`),
+followed by a possibly empty sequence of *selectors*.
 
 ~~~~ abnf
-json-path = root-selector *selector
+json-path = start-selector *selector
+start-selector = root-selector / current-item-selector
 root-selector = "$"               ; $ selects document root node
+current-item-selector = "@"       ; @ selects current node
 ~~~~
 
 The syntax and semantics of each selector is defined below.