Update release notes.

Author: kefo

NEWS

@@ -1,3 +1,21 @@
+--- 2.4.0 2023/11/22
+Changes towards updated v2.4.0 specifications:
+	ConvSpec 001-007:
+	  All bytes converted to Instance properties/classes
+	ConvSpec 3XX:
+	  Move creation of bf:colorContent (MARC 340) from Work to Instance
+	  Move creation of bf:soundContent (MARC 344) from Work to Instance
+	ConvSpec 240, X30:
+	  Creation of bflc:nonSortNum from non-filing indicators
+	ConvSpec 720,  740-758:
+	  Addition of bflc:SecondaryInstance to MARC records with 758 $1 fields
+	ConvSpec Process 0-8:
+	  Process 2 deprecated and instructions for creating Hubs moved to ConvSpec 240, X30
+	  Process 3 modified to create Instances instead of Items from 856 fields and 	  
+	  bf:electronicLocator structure changed from rdf:value to rdf:resource
+    New Preprocess 0
+
+
 --- 2.3.0 2023/01/20
 Changes towards updated v2.3.0 specifications:
   ConvSpec-050-088:  

release-notes.md

@@ -1,5 +1,18 @@
 # marc2bibframe2 release notes
 
+## v2.4.0
+
+Conversion updates based on specifications v2.4. See the Library of Congress’s [BIBFRAME site](https://www.loc.gov/bibframe/) for more details. Specifications are included in the distribution in the [spec](spec/) directory. Changes of note:
+
+* Placement of title non-filing indicator values in new bflc property "nonSortNum."
+* All bytes from the MARC 007 field are now mapped to the BIBFRAME Instance.
+* MARC 856 fields will create BIBFRAME Instances instead of BIBFRAME Items.
+* Splitting of a single MARC record with multiple 007, 300 and 856 fields into multiple records - one for each iteration of the resource – which creates multiple Instances linked to a Work. The split occurs as a preprocessing step documented in the new "Preprocess 0" spec. 
+* The Instances created via the splitting process are given the rdf:type "bflc:SecondaryInstance."
+
+See the [NEWS](NEWS) file and the [updated specifications](spec/) for full details of changes. Changes from v2.3.0 in the specifications are marked in red.
+
+
 ## v2.3.0
 
 Conversion updates based on specifications v2.3. See the Library of Congress’s [BIBFRAME site](https://www.loc.gov/bibframe/) for more details. Specifications are included in the distribution in the [spec](spec/) directory. Changes of note:
@@ -10,7 +23,7 @@ Conversion updates based on specifications v2.3. See the Library of Congress’s
 * 561, 563, and 581 to Instance unless $5, in which case continues to go to Item.
 * Incorporate new 'use by agency' statuses for Classification resources from 050, 055, 060, 070. 
 
-See the [NEWS](NEWS) file and the [updated specifications](spec/) for full details of changes. Changes from v2.1.0 in the specifications are marked in red.
+See the [NEWS](NEWS) file and the [updated specifications](spec/) for full details of changes. Changes from v2.2.0 in the specifications are marked in red.
 
 ## v2.2.1