diff --git a/schema/spdx.schema.json b/schema/spdx.schema.json
index 1e49a6d9..4b837b70 100644
--- a/schema/spdx.schema.json
+++ b/schema/spdx.schema.json
@@ -1,7 +1,7 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema#",
   "$id": "http://cyclonedx.org/schema/spdx.schema.json",
-  "$comment": "v1.0-3.27.0",
+  "$comment": "v1.0-3.28.0",
   "type": "string",
   "enum": [
     "0BSD",
@@ -14,6 +14,7 @@
     "Adobe-Glyph",
     "Adobe-Utopia",
     "ADSL",
+    "Advanced-Cryptics-Dictionary",
     "AFL-1.1",
     "AFL-1.2",
     "AFL-2.0",
@@ -27,6 +28,7 @@
     "AGPL-3.0-only",
     "AGPL-3.0-or-later",
     "Aladdin",
+    "ALGLIB-Documentation",
     "AMD-newlib",
     "AMDPLPA",
     "AML",
@@ -68,6 +70,7 @@
     "BlueOak-1.0.0",
     "Boehm-GC",
     "Boehm-GC-without-fee",
+    "BOLA-1.1",
     "Borceux",
     "Brian-Gladman-2-Clause",
     "Brian-Gladman-3-Clause",
@@ -94,6 +97,7 @@
     "BSD-3-Clause-No-Nuclear-Warranty",
     "BSD-3-Clause-Open-MPI",
     "BSD-3-Clause-Sun",
+    "BSD-3-Clause-Tso",
     "BSD-4-Clause",
     "BSD-4-Clause-Shortened",
     "BSD-4-Clause-UC",
@@ -102,12 +106,14 @@
     "BSD-Advertising-Acknowledgement",
     "BSD-Attribution-HPND-disclaimer",
     "BSD-Inferno-Nettverk",
+    "BSD-Mark-Modifications",
     "BSD-Protection",
     "BSD-Source-beginning-file",
     "BSD-Source-Code",
     "BSD-Systemics",
     "BSD-Systemics-W3Works",
     "BSL-1.0",
+    "Buddy",
     "BUSL-1.1",
     "bzip2-1.0.5",
     "bzip2-1.0.6",
@@ -116,6 +122,7 @@
     "CAL-1.0-Combined-Work-Exception",
     "Caldera",
     "Caldera-no-preamble",
+    "CAPEC-tou",
     "Catharon",
     "CATOSL-1.1",
     "CC-BY-1.0",
@@ -245,6 +252,9 @@
     "EPL-1.0",
     "EPL-2.0",
     "ErlPL-1.1",
+    "ESA-PL-permissive-2.4",
+    "ESA-PL-strong-copyleft-2.4",
+    "ESA-PL-weak-copyleft-2.4",
     "etalab-2.0",
     "EUDatagrid",
     "EUPL-1.0",
@@ -350,11 +360,14 @@
     "HPND-sell-MIT-disclaimer-xserver",
     "HPND-sell-regexpr",
     "HPND-sell-variant",
+    "HPND-sell-variant-critical-systems",
     "HPND-sell-variant-MIT-disclaimer",
     "HPND-sell-variant-MIT-disclaimer-rev",
+    "HPND-SMC",
     "HPND-UC",
     "HPND-UC-export-US",
     "HTMLTIDY",
+    "hyphen-bulgarian",
     "IBM-pibs",
     "ICU",
     "IEC-Code-Components-EULA",
@@ -373,6 +386,7 @@
     "IPL-1.0",
     "ISC",
     "ISC-Veillard",
+    "ISO-permission",
     "Jam",
     "JasPer-2.0",
     "jove",
@@ -450,10 +464,12 @@
     "MIT-Khronos-old",
     "MIT-Modern-Variant",
     "MIT-open-group",
+    "MIT-STK",
     "MIT-testregex",
     "MIT-Wu",
     "MITNFA",
     "MMIXware",
+    "MMPL-1.0.1",
     "Motosoto",
     "MPEG-SSG",
     "mpi-permissive",
@@ -487,6 +503,7 @@
     "NICTA-1.0",
     "NIST-PD",
     "NIST-PD-fallback",
+    "NIST-PD-TNT",
     "NIST-Software",
     "NLOD-1.0",
     "NLOD-2.0",
@@ -540,6 +557,7 @@
     "OLDAP-2.8",
     "OLFL-1.3",
     "OML",
+    "OpenMDW-1.0",
     "OpenPBS-2.3",
     "OpenSSL",
     "OpenSSL-standalone",
@@ -547,13 +565,16 @@
     "OPL-1.0",
     "OPL-UK-3.0",
     "OPUBL-1.0",
+    "OSC-1.0",
     "OSET-PL-2.1",
     "OSL-1.0",
     "OSL-1.1",
     "OSL-2.0",
     "OSL-2.1",
     "OSL-3.0",
+    "OSSP",
     "PADL",
+    "ParaType-Free-Font-1.3",
     "Parity-6.0.0",
     "Parity-7.0.0",
     "PDDL-1.0",
@@ -598,6 +619,7 @@
     "SGI-B-1.1",
     "SGI-B-2.0",
     "SGI-OpenGL",
+    "SGMLUG-PM",
     "SGP4",
     "SHL-0.5",
     "SHL-0.51",
@@ -635,6 +657,7 @@
     "TAPR-OHL-1.0",
     "TCL",
     "TCP-wrappers",
+    "TekHVC",
     "TermReadKey",
     "TGPPL-1.0",
     "ThirdEye",
@@ -662,9 +685,11 @@
     "Unlicense",
     "Unlicense-libtelnet",
     "Unlicense-libwhirlpool",
+    "UnRAR",
     "UPL-1.0",
     "URT-RLE",
     "Vim",
+    "Vixie-Cron",
     "VOSTROM",
     "VSL-1.0",
     "W3C",
@@ -673,12 +698,15 @@
     "w3m",
     "Watcom-1.0",
     "Widget-Workshop",
+    "WordNet",
     "Wsuipa",
+    "WTFNMFPL",
     "WTFPL",
     "wwl",
     "wxWindows",
     "X11",
     "X11-distribute-modifications-variant",
+    "X11-no-permit-persons",
     "X11-swapped",
     "Xdebug-1.03",
     "Xerox",
@@ -716,6 +744,7 @@
     "Bootloader-exception",
     "CGAL-linking-exception",
     "Classpath-exception-2.0",
+    "Classpath-exception-2.0-short",
     "CLISP-exception-2.0",
     "cryptsetup-OpenSSL-exception",
     "Digia-Qt-LGPL-exception-1.1",
@@ -746,6 +775,7 @@
     "i2p-gpl-java-exception",
     "Independent-modules-exception",
     "KiCad-libraries-exception",
+    "kvirc-openssl-exception",
     "LGPL-3.0-linking-exception",
     "libpri-OpenH323-exception",
     "Libtool-exception",
@@ -769,9 +799,12 @@
     "Qwt-exception-1.0",
     "romic-exception",
     "RRDtool-FLOSS-exception-2.0",
+    "rsync-linking-exception",
     "SANE-exception",
     "SHL-2.0",
     "SHL-2.1",
+    "Simple-Library-Usage-exception",
+    "sqlitestudio-OpenSSL-exception",
     "stunnel-exception",
     "SWI-exception",
     "Swift-exception",
diff --git a/schema/spdx.xsd b/schema/spdx.xsd
index 41a27b02..e94c265b 100644
--- a/schema/spdx.xsd
+++ b/schema/spdx.xsd
@@ -2,7 +2,7 @@
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
            elementFormDefault="qualified"
            targetNamespace="http://cyclonedx.org/schema/spdx"
-           version="1.0-3.27.0">
+           version="1.0-3.28.0">
 
     <xs:simpleType name="licenseId">
         <xs:restriction base="xs:string">
@@ -57,6 +57,11 @@
                     <xs:documentation>Amazon Digital Services License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="Advanced-Cryptics-Dictionary">
+                <xs:annotation>
+                    <xs:documentation>Advanced Cryptics Dictionary License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="AFL-1.1">
                 <xs:annotation>
                     <xs:documentation>Academic Free License v1.1</xs:documentation>
@@ -122,6 +127,11 @@
                     <xs:documentation>Aladdin Free Public License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="ALGLIB-Documentation">
+                <xs:annotation>
+                    <xs:documentation>ALGLIB Documentation License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="AMD-newlib">
                 <xs:annotation>
                     <xs:documentation>AMD newlib License</xs:documentation>
@@ -327,6 +337,11 @@
                     <xs:documentation>Boehm-Demers-Weiser GC License (without fee)</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="BOLA-1.1">
+                <xs:annotation>
+                    <xs:documentation>Buena Onda License Agreement v1.1</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="Borceux">
                 <xs:annotation>
                     <xs:documentation>Borceux license</xs:documentation>
@@ -457,6 +472,11 @@
                     <xs:documentation>BSD 3-Clause Sun Microsystems</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="BSD-3-Clause-Tso">
+                <xs:annotation>
+                    <xs:documentation>BSD 3-Clause Tso variant</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="BSD-4-Clause">
                 <xs:annotation>
                     <xs:documentation>BSD 4-Clause &quot;Original&quot; or &quot;Old&quot; License</xs:documentation>
@@ -497,6 +517,11 @@
                     <xs:documentation>BSD-Inferno-Nettverk</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="BSD-Mark-Modifications">
+                <xs:annotation>
+                    <xs:documentation>BSD Mark Modifications License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="BSD-Protection">
                 <xs:annotation>
                     <xs:documentation>BSD Protection License</xs:documentation>
@@ -527,6 +552,11 @@
                     <xs:documentation>Boost Software License 1.0</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="Buddy">
+                <xs:annotation>
+                    <xs:documentation>Buddy License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="BUSL-1.1">
                 <xs:annotation>
                     <xs:documentation>Business Source License 1.1</xs:documentation>
@@ -567,6 +597,11 @@
                     <xs:documentation>Caldera License (without preamble)</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="CAPEC-tou">
+                <xs:annotation>
+                    <xs:documentation>Common Attack    Pattern Enumeration and Classification License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="Catharon">
                 <xs:annotation>
                     <xs:documentation>Catharon License</xs:documentation>
@@ -1212,6 +1247,21 @@
                     <xs:documentation>Erlang Public License v1.1</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="ESA-PL-permissive-2.4">
+                <xs:annotation>
+                    <xs:documentation>European Space Agency Public License – v2.4 – Permissive (Type 3)</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
+            <xs:enumeration value="ESA-PL-strong-copyleft-2.4">
+                <xs:annotation>
+                    <xs:documentation>European Space Agency Public License (ESA-PL) - V2.4 - Strong Copyleft (Type 1)</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
+            <xs:enumeration value="ESA-PL-weak-copyleft-2.4">
+                <xs:annotation>
+                    <xs:documentation>European Space Agency Public License – v2.4 – Weak Copyleft (Type 2)</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="etalab-2.0">
                 <xs:annotation>
                     <xs:documentation>Etalab Open License 2.0</xs:documentation>
@@ -1737,6 +1787,11 @@
                     <xs:documentation>Historical Permission Notice and Disclaimer - sell variant</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="HPND-sell-variant-critical-systems">
+                <xs:annotation>
+                    <xs:documentation>HPND - sell variant with safety critical systems clause</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="HPND-sell-variant-MIT-disclaimer">
                 <xs:annotation>
                     <xs:documentation>HPND sell variant with MIT disclaimer</xs:documentation>
@@ -1747,6 +1802,11 @@
                     <xs:documentation>HPND sell variant with MIT disclaimer - reverse</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="HPND-SMC">
+                <xs:annotation>
+                    <xs:documentation>Historical Permission Notice and Disclaimer - SMC variant</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="HPND-UC">
                 <xs:annotation>
                     <xs:documentation>Historical Permission Notice and Disclaimer - University of California variant</xs:documentation>
@@ -1762,6 +1822,11 @@
                     <xs:documentation>HTML Tidy License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="hyphen-bulgarian">
+                <xs:annotation>
+                    <xs:documentation>hyphen-bulgarian License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="IBM-pibs">
                 <xs:annotation>
                     <xs:documentation>IBM PowerPC Initialization and Boot Software</xs:documentation>
@@ -1852,6 +1917,11 @@
                     <xs:documentation>ISC Veillard variant</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="ISO-permission">
+                <xs:annotation>
+                    <xs:documentation>ISO permission notice</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="Jam">
                 <xs:annotation>
                     <xs:documentation>Jam License</xs:documentation>
@@ -2237,6 +2307,11 @@
                     <xs:documentation>MIT Open Group variant</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="MIT-STK">
+                <xs:annotation>
+                    <xs:documentation>MIT-STK License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="MIT-testregex">
                 <xs:annotation>
                     <xs:documentation>MIT testregex Variant</xs:documentation>
@@ -2257,6 +2332,11 @@
                     <xs:documentation>MMIXware License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="MMPL-1.0.1">
+                <xs:annotation>
+                    <xs:documentation>Minecraft Mod Public License v1.0.1</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="Motosoto">
                 <xs:annotation>
                     <xs:documentation>Motosoto License</xs:documentation>
@@ -2422,6 +2502,11 @@
                     <xs:documentation>NIST Public Domain Notice with license fallback</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="NIST-PD-TNT">
+                <xs:annotation>
+                    <xs:documentation>NIST    Public Domain Notice TNT variant</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="NIST-Software">
                 <xs:annotation>
                     <xs:documentation>NIST Software License</xs:documentation>
@@ -2687,6 +2772,11 @@
                     <xs:documentation>Open Market License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="OpenMDW-1.0">
+                <xs:annotation>
+                    <xs:documentation>OpenMDW License Agreement v1.0</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="OpenPBS-2.3">
                 <xs:annotation>
                     <xs:documentation>OpenPBS v2.3 Software License</xs:documentation>
@@ -2722,6 +2812,11 @@
                     <xs:documentation>Open Publication License v1.0</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="OSC-1.0">
+                <xs:annotation>
+                    <xs:documentation>OSC License 1.0</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="OSET-PL-2.1">
                 <xs:annotation>
                     <xs:documentation>OSET Public License version 2.1</xs:documentation>
@@ -2752,11 +2847,21 @@
                     <xs:documentation>Open Software License 3.0</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="OSSP">
+                <xs:annotation>
+                    <xs:documentation>OSSP License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="PADL">
                 <xs:annotation>
                     <xs:documentation>PADL License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="ParaType-Free-Font-1.3">
+                <xs:annotation>
+                    <xs:documentation>ParaType Free Font Licensing Agreement v1.3</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="Parity-6.0.0">
                 <xs:annotation>
                     <xs:documentation>The Parity Public License 6.0.0</xs:documentation>
@@ -2977,6 +3082,11 @@
                     <xs:documentation>SGI OpenGL License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="SGMLUG-PM">
+                <xs:annotation>
+                    <xs:documentation>SGMLUG Parser Materials License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="SGP4">
                 <xs:annotation>
                     <xs:documentation>SGP4 Permission Notice</xs:documentation>
@@ -3162,6 +3272,11 @@
                     <xs:documentation>TCP Wrappers License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="TekHVC">
+                <xs:annotation>
+                    <xs:documentation>TekHVC License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="TermReadKey">
                 <xs:annotation>
                     <xs:documentation>TermReadKey License</xs:documentation>
@@ -3297,6 +3412,11 @@
                     <xs:documentation>Unlicense - libwhirlpool variant</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="UnRAR">
+                <xs:annotation>
+                    <xs:documentation>UnRAR License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="UPL-1.0">
                 <xs:annotation>
                     <xs:documentation>Universal Permissive License v1.0</xs:documentation>
@@ -3312,6 +3432,11 @@
                     <xs:documentation>Vim License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="Vixie-Cron">
+                <xs:annotation>
+                    <xs:documentation>Vixie Cron License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="VOSTROM">
                 <xs:annotation>
                     <xs:documentation>VOSTROM Public License for Open Source</xs:documentation>
@@ -3352,11 +3477,21 @@
                     <xs:documentation>Widget Workshop License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="WordNet">
+                <xs:annotation>
+                    <xs:documentation>WordNet License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="Wsuipa">
                 <xs:annotation>
                     <xs:documentation>Wsuipa License</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="WTFNMFPL">
+                <xs:annotation>
+                    <xs:documentation>Do What The F*ck You Want To But It&apos;s Not My Fault Public License</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="WTFPL">
                 <xs:annotation>
                     <xs:documentation>Do What The F*ck You Want To Public License</xs:documentation>
@@ -3382,6 +3517,11 @@
                     <xs:documentation>X11 License Distribution Modification Variant</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="X11-no-permit-persons">
+                <xs:annotation>
+                    <xs:documentation>X11 no permit persons clause</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="X11-swapped">
                 <xs:annotation>
                     <xs:documentation>X11 swapped final paragraphs</xs:documentation>
@@ -3568,6 +3708,11 @@
                     <xs:documentation>Classpath exception 2.0</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="Classpath-exception-2.0-short">
+                <xs:annotation>
+                    <xs:documentation>Classpath exception 2.0 - short</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="CLISP-exception-2.0">
                 <xs:annotation>
                     <xs:documentation>CLISP exception 2.0</xs:documentation>
@@ -3718,6 +3863,11 @@
                     <xs:documentation>KiCad Libraries Exception</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="kvirc-openssl-exception">
+                <xs:annotation>
+                    <xs:documentation>kvirc OpenSSL Exception</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="LGPL-3.0-linking-exception">
                 <xs:annotation>
                     <xs:documentation>LGPL-3.0 Linking Exception</xs:documentation>
@@ -3833,6 +3983,11 @@
                     <xs:documentation>RRDtool FLOSS exception 2.0</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="rsync-linking-exception">
+                <xs:annotation>
+                    <xs:documentation>rsync Linking Exception</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="SANE-exception">
                 <xs:annotation>
                     <xs:documentation>SANE Exception</xs:documentation>
@@ -3848,6 +4003,16 @@
                     <xs:documentation>Solderpad Hardware License v2.1</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="Simple-Library-Usage-exception">
+                <xs:annotation>
+                    <xs:documentation>Simple Library Usage Exception</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
+            <xs:enumeration value="sqlitestudio-OpenSSL-exception">
+                <xs:annotation>
+                    <xs:documentation>sqlitestudio OpenSSL exception</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="stunnel-exception">
                 <xs:annotation>
                     <xs:documentation>stunnel Exception</xs:documentation>