1 files changed, 6 insertions, 0 deletions
diff --git a/docs/manifest-format.md b/docs/manifest-format.md
index 8e5e2874..6156333a 100644
--- a/docs/manifest-format.md
+++ b/docs/manifest-format.md
@@ -109,6 +109,12 @@ following DTD:
 ]>
 ```
+For compatibility purposes across repo releases, all unknown elements are
+silently ignored.  However, repo reserves all possible names for itself for
+future use.  If you want to use custom elements, the `x-*` namespace is
+reserved for that purpose, and repo guarantees to never allocate any
+corresponding names.
 A description of the elements and their attributes follows.

diff --git a/docs/manifest-format.md b/docs/manifest-format.md index 8e5e2874..6156333a 100644 --- a/docs/manifest-format.md +++ b/docs/manifest-format.md
@@ -109,6 +109,12 @@ following DTD:
109	]>	109	]>
110	```	110	```
111		111
		112	For compatibility purposes across repo releases, all unknown elements are
		113	silently ignored. However, repo reserves all possible names for itself for
		114	future use. If you want to use custom elements, the `x-*` namespace is
		115	reserved for that purpose, and repo guarantees to never allocate any
		116	corresponding names.
		117
112	A description of the elements and their attributes follows.	118	A description of the elements and their attributes follows.
113		119
114		120