Explicitly specify XML 1.0 and link to the specification. Forbid
"external markup declarations" and processing DTDs to secure against
common XML attacks.

Signed-off-by: Michał Górny <mgorny@gentoo.org>
---
glep-0068.rst | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/glep-0068.rst b/glep-0068.rst
index 78ac7ea..d3e3611 100644
--- a/glep-0068.rst
+++ b/glep-0068.rst
@@ -6,8 +6,8 @@ Type: Standards Track
Status: Final
Version: 1.2
Created: 2016-03-14
-Last-Modified: 2022-05-22
-Post-History: 2016-03-16, 2018-02-20, 2022-05-22
+Last-Modified: 2022-10-07
+Post-History: 2016-03-16, 2018-02-20, 2022-05-22, 2022-10-07
Content-Type: text/x-rst
Requires: 67
Replaces: 34, 46, 56
@@ -59,10 +59,14 @@ Metadata files
--------------

This specification provides two kinds of metadata files: category metadata -files and package metadata files. Both kinds of files use XML file format -with structure defined in this GLEP. The XML structure does not use
-a namespace and must not contain any elements outside the scope of this -specification.
+files and package metadata files. Both kinds of files use the XML 1.0 file +format [#XML10]_. They must not us