diff --git a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-customization.xsl b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-customization.xsl
index 0d57424b59..012d86384a 100644
--- a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-customization.xsl
+++ b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-customization.xsl
@@ -1,4 +1,6 @@
 <?xml version='1.0'?>
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
+
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/1999/xhtml" xmlns:fo="http://www.w3.org/1999/XSL/Format" version="1.0">
 
   <xsl:import href="http://downloads.yoctoproject.org/mirror/docbook-mirror/docbook-xsl-1.76.1/xhtml/docbook.xsl" />
diff --git a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-style.css b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-style.css
index 386841debe..e4e79d90ef 100644
--- a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-style.css
+++ b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-style.css
@@ -1,4 +1,7 @@
 /*
+
+   SPDX-License-Identifier: CC-BY-2.0-UK
+
    Generic XHTML / DocBook XHTML CSS Stylesheet.
 
    Browser wrangling and typographic design by
diff --git a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-titlepage.xsl b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-titlepage.xsl
index a435ac77ab..e74ac530dd 100644
--- a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-titlepage.xsl
+++ b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs-titlepage.xsl
@@ -1,4 +1,5 @@
 <?xml version="1.0"?>
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:exsl="http://exslt.org/common" version="1.0" exclude-result-prefixes="exsl">
 
diff --git a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs.xml b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs.xml
index 3c83afd46b..198c7b9689 100644
--- a/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs.xml
+++ b/documentation/brief-yoctoprojectqs/brief-yoctoprojectqs.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <article id='brief-yocto-project-qs-intro'>
     <articleinfo>