diff --git a/xep-0393.xml b/xep-0393.xml
index 1db8e336..5c59a94b 100644
--- a/xep-0393.xml
+++ b/xep-0393.xml
@@ -25,6 +25,17 @@
+ Reorder block and span sections, simplify block parsing, and update the
+ definition of a span.
+
- Groups of lines that are not part of any other block are considered a - "plain" block, as are individual lines of text that are not inside of a - preformatted text block. + Individual lines of text that are not inside of a preformatted text + block are considered a "plain" block. Plain blocks are not bound by styling directives and do not imply formatting themselves, but they may contain spans which imply formatting. + Plain blocks may not contain child blocks.