Json.NET 6.0, JSON Merge, JSONPath

Json.NET Updates: Merge, Dependency Injection, F# and JSONPath Support: @ InfoQ
"several new features have been added, including several F# specific features, support for JSONPath querying, ability to integrate with Dependency Injection frameworks, ability to Merge JSON objects and more."

James Newton-King - Json.NET 6.0 Release 4 - JSON Merge, Dependency Injection

JSONPath - XPath for JSON
The following XPath expression
/store/book[1]/title
would look like
x.store.book[0].title
or
x['store']['book'][0]['title']

JSONPath expressions can use the dot–notation
$.store.book[0].title
or the bracket–notation
$['store']['book'][0]['title']

Expressions of the underlying scripting language (<expr>) can be used as an alternative to explicit names or indices as in
$.store.book[(@.length-1)].title
using the symbol '@' for the current object. Filter expressions are supported via the syntax ?(<boolean expr>) as in
$.store.book[?(@.price < 10)].title

XPath	JSONPath	Description
/	$	the root object/element
.	@	the current object/element
/	. or []	child operator
..	n/a	parent operator
//	..	recursive descent. JSONPath borrows this syntax from E4X.
*	*	wildcard. All objects/elements regardless their names.
@	n/a	attribute access. JSON structures don't have attributes.
[]	[]	subscript operator. XPath uses it to iterate over element collections and for predicates. In Javascript and JSON it is the native array operator.
|	[,]	Union operator in XPath results in a combination of node sets. JSONPath allows alternate names or array indices as a set.
n/a	[start:end:step]	array slice operator borrowed from ES4.
[]	?()	applies a filter (script) expression.
n/a	()	script expression, using the underlying script engine.
()	n/a	grouping in Xpath