diff --git a/docs/conf.py b/docs/conf.py
index 5a0b8f31..dab41171 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,8 +1,10 @@
 import os
 
 import django
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "swh.deposit.settings.development")
 django.setup()
 
 from swh.docs.sphinx.conf import *  # NoQA
+
+extensions = ["sphinx.ext.autosectionlabel"]
diff --git a/docs/specs/spec-meta-deposit.rst b/docs/specs/spec-meta-deposit.rst
index f8e99144..2264b640 100644
--- a/docs/specs/spec-meta-deposit.rst
+++ b/docs/specs/spec-meta-deposit.rst
@@ -1,116 +1,122 @@
 The metadata-deposit
 ====================
 
 Goal
 ----
 A client wishes to deposit only metadata about an origin or object in the
 Software Heritage archive.
 
 The metadata-deposit is a special deposit where no content is
 provided and the data transferred to Software Heritage is only
 the metadata about an object in the archive.
 
 Requirements
 ------------
-The scope of the metadata-deposit is different than the
-sparse-deposit. While a sparse-deposit creates a revision with referenced
-directories and content files, the metadata-deposit references any of the
-following:
-
-- origin
-- snapshot
-- release
-- revision
-- directory
-- content
 
+1. :ref:`Create a metadata-only deposit through a POST request<Create deposit>`
+2. It is composed of ONLY one xml metadata file
+3. It MUST comply with :ref:`the metadata requirements<Metadata Requirements>`
+4. It MUST reference an **object** or an **origin** in a deposit tag
+5. The reference SHOULD exist in the SWH archive
+6. The **object** reference MUST be a SWHID on one of the following artifact types:
+ - origin
+ - snapshot
+ - release
+ - revision
+ - directory
+ - content
+7. The SWHID MAY be a `core identifier`_ with or without `qualifiers`_
+8. The SWHID MUST NOT reference a fragment of code with the classifier `lines`
+
+.. _core identifier: https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html#core-identifiers
+.. _qualifiers: https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html#qualifiers
 
 A complete metadata example
 ---------------------------
 The reference element is included in the metadata xml atomEntry under the
 swh namespace:
 
 .. code:: xml
 
   <?xml version="1.0"?>
   <entry xmlns="http://www.w3.org/2005/Atom"
            xmlns:codemeta="https://doi.org/10.5063/SCHEMA/CODEMETA-2.0"
            xmlns:swh="https://www.softwareheritage.org/schema/2018/deposit">
       <author>
         <name>HAL</name>
         <email>hal@ccsd.cnrs.fr</email>
       </author>
       <client>hal</client>
       <external_identifier>hal-01243573</external_identifier>
       <codemeta:name>The assignment problem</codemeta:name>
       <codemeta:url>https://hal.archives-ouvertes.fr/hal-01243573</codemeta:url>
       <codemeta:identifier>other identifier, DOI, ARK</codemeta:identifier>
       <codemeta:applicationCategory>Domain</codemeta:applicationCategory>
       <codemeta:description>description</codemeta:description>
       <codemeta:author>
         <codemeta:name> author1 </codemeta:name>
         <codemeta:affiliation> Inria </codemeta:affiliation>
         <codemeta:affiliation> UPMC </codemeta:affiliation>
       </codemeta:author>
       <codemeta:author>
         <codemeta:name> author2 </codemeta:name>
         <codemeta:affiliation> Inria </codemeta:affiliation>
         <codemeta:affiliation> UPMC </codemeta:affiliation>
       </codemeta:author>
       <swh:deposit>
         <swh:reference>
           <swh:origin url='https://github.com/user/repo'/>
         </swh:reference>
       </swh:deposit>
   </entry>
 
 References
 ^^^^^^^^^^
 
 Origins
 =======
 
 The metadata may be on an origin, identified by the origin's URL:
 
 .. code:: xml
 
   <swh:deposit>
     <swh:reference>
       <swh:origin url="https://github.com/user/repo" />
     </swh:reference>
   </swh:deposit>
 
 Graph objects
 =============
 
 It may also reference an object in the `SWH graph <data-model>`: contents,
 directories, revisions, releases, and snapshots:
 
 .. code:: xml
 
   <swh:deposit>
     <swh:reference>
       <swh:object swhid="swh:1:xxx:aaaaaaaaaaaaaa..." />
     </swh:reference>
   </swh:deposit>
 
 The value of the ``swhid`` attribute must be a `SWHID <persistent-identifiers>`,
 with any context qualifiers in this list:
 
 * ``origin``
 * ``visit``
 * ``anchor``
 * ``path``
 
 and they should be provided whenever relevant, especially ``origin``.
 
 Other qualifiers are not allowed (for example, ``line`` isn't because SWH
 cannot store metadata at a finer level than entire contents).
 
 
 Loading procedure
 ------------------
 
 In this case, the metadata-deposit will be injected as a metadata entry of
 the relevant object, with the information about the contributor of the deposit.
 Contrary to the complete and sparse deposit, there will be no object creation.