Release 1.99.0:

* Warn when a deprecated vocabulary constant is found that it is deprecated, and that the access pattern will change. Fixes ruby-rdf#191.
* RDF.rb 2.0 will deprecate the use of `context` in favor of `graph_name`. This affects many methods, but also :context used as an option. For issue ruby-rdf#189.
* Change `#has_blank_nodes?` to `#node?`, but keep as method alias.
* Add `Term#compatible?` from SPARQL.
* Add a `#valid?` implementation to Reader base.
* Fix issues converting DateTime and Time objects to strings when not canonicalizing. Fixes ruby-rdf#218.
* Fix named graph support in `RDF::Transaction`
  * Use of `RDF::Graph` to store inserts and deletes in `RDF::Transaction` is heavy handed, and results in the destruction of graph names on statements passed in. This fix simply uses `[]` to handle the statement lists (`RDF::Enumerable` is already included by force).
  * This should be cheaper and insulate us from potentially unwanted behavior outside of `Enumerable`. Clients can still use `RDF::Graph` by passing it on initialization at their own risk.
* Correct behaviors for open_file:
  * charset should be a downcased string. Fixes ruby-rdf#199.
  * content_encoding reflects Content-Encoding, as an array of downcased strings.
  * Non-UTF input is transformed to UTF-8, so that `external_encoding` is now "utf-8" with `charset` the original character set.
  * With Ruby 2.2+, attempt to turn Unicode input into NFC.
* Make `Transaction#execute` more atomic
  * Executing a transaction individually called `#delete` or `#insert` for each statement in the changeset. This prevents using the features of `Repositories` with a more efficient implementation of `#insert/delete_statements`.
* Use `#clear_statements` when available
  * `Mutable#clear` checks whether the instance responds to `#clear_statements` and falls back on `#delete_statements`. The former clears the entire mutable, using e.g., `graph_name`, while the later has enumerative semantics (deleting the members of the set of statements). Because `#clear_statements` is protected or private, it will never be used by immutable without the `true` flag on `#respond_to?`.
* Add `Statement.#complete?/#incomplete?` to check for nil elements. Update `Repository#insert_statement` to not add incomplete statements (silently); raises an ArgumentError. For ruby-rdf#226.

Release 1.1.17.1:

* Don't use yield in Repository query_execute, use block.call instead, due to an MRI issue.

Release 1.1.17:

* Performance improvements from @jperville.
* Update schema.org vocabulary for sdo-ganymede (2.1).

Release 1.1.16.1:

* Autoload `Countable::Enumerator`, `Enumerable::Enumerator`, and `Queryable::Enumerator` so that they pick up behavior from other gems extending these modules.

Release 1.16

* Fix URI#join to correct mistakes in Merge Paths
* Remedied JRuby error due to RDF::NTriples::Writer::ESCAPE_PLAIN.

Released version 1.1.6.

* Fixed ruby-rdf#210: remedied a RegexpError with JRuby.

Release 1.1.15:

* Ensure that opening a missing local file still results in IOError.
* Join redirection Location to base_uri when redirecting, as Location may be a relative path. Fixes ruby-rdf#203.
* Enable Ruby-idiomatic aliases for camelCased props
* Sync with release 2.1 of schema.org vocabulary.
* Implement `List#[]=` based on description from Array.

Release 1.1.14

* Update schema vocabulary with sdo-gozer (2.0)
* Don't create Vocabulary accessor for `hash` in addition to `property`. This addresses a problem found in ruby-rdf/rdf-vocab#18 (comment).
* Fix C14N issues for Literal::Double with NaN, INF and -INF.
* Implement #freeze stopping writability. (@terrellt)

Release 1.1.13

* Update specs to use new style shared_examples (@no-reply)
* Loosen hash check on `Node#==` (@no-reply)
* Fix validate! in Value to return self, as is documented.
* Add Pattern#valid? to improve on Statement#valid? for legitimate patterns.
* Improve Query#validate! to validate patterns, not require the first pattern to not be optional, and modernize check for appropriate partition of required and optional patterns.

Release 1.1.12

General support for SPARQL Update:

* Add Query#apply_context to finalize the context of patterns having a nil context.
* Add Query#variable? and Query#has_blank_nodes? which projects onto query patterns.
* Make RDF::Query Enumerable, and implement #each_statement to enmerate patterns.
* Query::Pattern#bind binds variables from a Solution, to either make the pattern not variable, or still variable and unbound, depending on if all variables are bound to bound variables.