IHE · ToddCooper · Apr 1, 2026 · Apr 1, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,7 +14,11 @@ The SDPi changelog shall not contain the following sections
 
 Each section shall contain a list of action items of the following format: `<brief one-sentence description of what has been done> (#<issue number & URL>).`
 
+<!--
 ## Unreleased
+-->
+
+## [2.4.0] - 2026-04-01
 
 ### Added
 
@@ -32,6 +36,8 @@ Each section shall contain a list of action items of the following format: `<bri
 
 ### Editorial Fixes
 
+- Final cleanup for release 2.4.0 ([#523](https://github.com/IHE/DEV.SDPi/issues/523))
+
 
 ## [2.3.0] - 2025-12-19
 

diff --git a/asciidoc/sdpi-supplement-intro.adoc b/asciidoc/sdpi-supplement-intro.adoc
@@ -9,22 +9,20 @@
 |===
 a| *SDPi {ihe_supplement_sdpi_revision_short} Supplement -- _STU / TI Version_ -- Note*:
 
-This version of the SDPi 2.3 Standard for Trial Use (HL7 STU) / Trial Implementation (IHE TI) supplement is the 3rd release in 2025, continuing the objective to provide three to four releases each year that include both _incremental_ updates (e.g., editorial "fixes"), ballot comment resolutions (e.g., from HL7 ballot cycles), and additional capability enhancements.
+This version of the SDPi 2.4 Standard for Trial Use (HL7 STU) / Trial Implementation (IHE TI) supplement is the 1st release in 2026, continuing the objective to provide three to four releases each year that include both _incremental_ updates (e.g., editorial "fixes"), ballot comment resolutions (e.g., from HL7 ballot cycles), and additional capability enhancements.
 For this release, key changes include:
 
-1. Added new extensions _ReportSequence_ and _Relations_
-2. Added conformity statement tables for SPDi-defined requirements
-3. Added semantic markup to support rich artefact generation
-
-Numerous other corrections and enhancements are included.
+1. Added new Distributed Alarm System option and related transactions DEV-48 and DEV-49 (a.k.a. early "pre-published" integration of the IEEE 11073-10702 standard)
+2. Added OID framework to Appendix 3:Z
+3. Made several corrections and clarifications
 
 All changes incorporated in a release are managed through Github Issues and reviewed Pull Requests.
 For a list of those related to this release, see <<sdpi_issue_management>> below.
 For HL7 ballot comment resolution, links are made from HL7 ballot Jira tickets to IHE DEV.SDPi Github Issues that then enable tracking of the comment resolution implementation in a specific release.
 
 
 NOTE: This supplement also includes both normative and informative references to other specifications (see <<vol1_appendix_b_references>>), some of which are finalized and published and others that are either being developed or in revision.
-For example, the IEEE 11073-10702 PKP standard is in mature development stage; however, some requirements from that pre-standard may be included (non-normatively) in this SDPi specification, providing a pathway to early experience and validation.
+For example, the IEEE 11073-10702 PKP standard is in mature development stage; however, some requirements from that pre-standard are included (non-normatively) in this SDPi specification, providing a pathway to early experience and validation.
 When a referenced specification is used that is in development or revision, a note will be provided in the <<vol1_appendix_b_referenced_standards>> clearly indicating its status.
 
 It is recognized that this release is a work-in-progress that will continue to subsequent versions.

diff --git a/asciidoc/sdpi-supplement.adoc b/asciidoc/sdpi-supplement.adoc
@@ -34,7 +34,7 @@
 :ihe_supplement_sdpi_revision_short: {sdpi_version_major}.{sdpi_version_minor}
 :ihe_supplement_sdpi_revision_date: {localdatetime}
 :ihe_supplement_sdpi_revision_label: Standard for Trial Use / Implementation
-:ihe_supplement_sdpi_publication_month: March XX, 2026
+:ihe_supplement_sdpi_publication_month: April 1, 2026
 :ihe_supplement_sdpi_public_comment_submission_deadline: N/A
 
 // Oid, assigned by IHE-DEV, for the SDPi specification

diff --git a/asciidoc/volume2/dev-48/tf2-dev-48.adoc b/asciidoc/volume2/dev-48/tf2-dev-48.adoc
@@ -11,6 +11,16 @@
 [role=transaction,transaction-id=DEV-48]
 === Establish Distributed Alarm System [{var_transaction_id}]
 
+[%noheader]
+[%autowidth]
+[cols="1"]
+|===
+a| *SDPi {ihe_supplement_sdpi_revision_short} Supplement -- _STU / TI Version_ -- Note*:
+
+This transaction is INFORMATIVE, given that it is based on the mature draft, but not yet finalized, IEEE 11073-10702 (Alert PKP) standard. However, it is included to provide a pathway to early experience and validation. Once the IEEE 11073-10702 standard is finalized and published, this transaction will be updated to be normative.
+
+|===
+
 ==== Scope
 
 include::tf2-dev-48-summary.adoc[]

diff --git a/asciidoc/volume2/dev-49/tf2-dev-49.adoc b/asciidoc/volume2/dev-49/tf2-dev-49.adoc
@@ -9,6 +9,16 @@
 [role=transaction,transaction-id=DEV-49]
 === End Distributed Alarm System [{var_transaction_id}]
 
+[%noheader]
+[%autowidth]
+[cols="1"]
+|===
+a| *SDPi {ihe_supplement_sdpi_revision_short} Supplement -- _STU / TI Version_ -- Note*:
+
+This transaction is INFORMATIVE, given that it is based on the mature draft, but not yet finalized, IEEE 11073-10702 (Alert PKP) standard. However, it is included to provide a pathway to early experience and validation. Once the IEEE 11073-10702 standard is finalized and published, this transaction will be updated to be normative.
+
+|===
+
 ==== Scope
 
 include::tf2-dev-49-summary.adoc[]