Remove references to 'master' branch
diff --git a/README.md b/README.md
index 44da832..d4db906 100644
--- a/README.md
+++ b/README.md
@@ -50,11 +50,11 @@
If you find any issues please provide a PR or [create a JIRA ticket](https://issues.apache.org/jira/projects/JDO/issues/?filter=allopenissues).
### Publishing the Site
-After changes have been made to the sources in the `src/main/asciidoc` or `src/main/template` directory, changes will be published automatically to the live web site by simply pushing changes to the master branch of the repository. The process is as follows:
+After changes have been made to the sources in the `src/main/asciidoc` or `src/main/template` directory, changes will be published automatically to the live web site by simply pushing changes to the main branch of the repository. The process is as follows:
-1. Pushing changes to the master branch invokes the post-push script in [`db-jdo-site/.github/workflows/deploy-site.yml`](./.github/workflows/deploy-site.yml) which builds the site in `target/site` via `mvn clean package`.
+1. Pushing changes to the main branch invokes the post-push script in [`db-jdo-site/.github/workflows/deploy-site.yml`](./.github/workflows/deploy-site.yml) which builds the site in `target/site` via `mvn clean package`.
-2. If the build is successful, the build artifacts in the master branch are pushed to the `publish` branch.
+2. If the build is successful, the build artifacts in the main branch are pushed to the `publish` branch.
3. Once the changes have been pushed to the `publish` branch, the script in `.asf.yaml.publish` is automatically invoked. This script is executed by Apache Infrastructure machines, and it publishes changes to `db.apache.org/jdo`. It may take some time for the changes to be seen on the live site.
Details on the use of .asf.yaml is found [here](https://cwiki.apache.org/confluence/display/INFRA/git+-+.asf.yaml+features#git.asf.yamlfeatures-WebSiteDeploymentServiceforGitRepositories).
diff --git a/src/main/asciidoc/source-code.adoc b/src/main/asciidoc/source-code.adoc
index b79c8ad..a2e9b35 100644
--- a/src/main/asciidoc/source-code.adoc
+++ b/src/main/asciidoc/source-code.adoc
@@ -14,8 +14,9 @@
To receive notice of commits to the repository subscribe to
jdo-commits@db.apache.org by sending email to jdo-commits-subscribe@db.apache.org.
-The ASF operates a dual master system for repositories that use Git as their primary version
+The ASF operates a dual hosting system for repositories that use Git as their primary version
control system. This means committers may commit to either gitbox.apache.org or GitHub.
+Changes are automatically mirrored to the other repository.
=== Checking Out Code
diff --git a/src/main/asciidoc/tck.adoc b/src/main/asciidoc/tck.adoc
index a0666af..1f31658 100644
--- a/src/main/asciidoc/tck.adoc
+++ b/src/main/asciidoc/tck.adoc
@@ -22,9 +22,9 @@
link:source-code.html[Source Code] for instructions on
checking out code.
. Follow the instructions in the Prerequisites section of
-https://github.com/apache/db-jdo/blob/master/README.md[README.md]
+https://github.com/apache/db-jdo/blob/main/README.md[README.md]
. Follow the procedure in
-https://github.com/apache/db-jdo/blob/master/tck/RunRules.md[RunRules.md]
+https://github.com/apache/db-jdo/blob/main/tck/RunRules.md[RunRules.md]
in the tck directory.
=== Demonstrating Complianceanchor:Demonstrating_Compliance[]
