doc: prepare for asciidoc based specification
diff --git a/docs/imsi-pseudo-spec-docinfo.xml b/docs/imsi-pseudo-spec-docinfo.xml
new file mode 100644
index 0000000..de798c7
--- /dev/null
+++ b/docs/imsi-pseudo-spec-docinfo.xml
@@ -0,0 +1,46 @@
+<revhistory>
+ <revision>
+ <revnumber>1</revnumber>
+ <date>2020-04-03</date>
+ <authorinitials>OS</authorinitials>
+ <revremark>
+ Initial version.
+ </revremark>
+ </revision>
+ </revhistory>
+
+<authorgroup>
+ <author>
+ <firstname>Oliver</firstname>
+ <surname>Smith</surname>
+ <email>osmith@sysmocom.de</email>
+ <authorinitials>OS</authorinitials>
+ <affiliation>
+ <shortaffil>sysmocom</shortaffil>
+ <orgname>sysmocom - s.f.m.c. GmbH</orgname>
+ <jobtitle>Employee</jobtitle>
+ </affiliation>
+ </author>
+</authorgroup>
+
+<copyright>
+ <year>2020</year>
+ <holder>sysmocom - s.f.m.c. GmbH</holder>
+</copyright>
+
+<legalnotice>
+ <para>
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU Free Documentation License,
+ Version 1.3 or any later version published by the Free Software
+ Foundation; with no Invariant Sections, no Front-Cover Texts,
+ and no Back-Cover Texts. A copy of the license is included in
+ the section entitled "GNU Free Documentation License".
+ </para>
+ <para>
+ The Asciidoc source code of this manual is linked at
+ <ulink url="https://osmocom.org/projects/imsi-pseudo/wiki">
+ https://osmocom.org/projects/imsi-pseudo/wiki
+ </ulink>
+ </para>
+</legalnotice>