diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 966087019..b92694c15 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,46 +2,15 @@ name: CI
 on: [push, pull_request]
 jobs:
   build:
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.10'
-          cache: pip
-          cache-dependency-path: '**/requirements*.txt'
-      # Don't install editable projects in the current working directory.
-      # https://pip.pypa.io/en/latest/reference/pip_install/#install-src
-      - run: pip install --src $GITHUB_WORKSPACE/../src -r requirements.txt
-      - if: github.repository == 'open-contracting/standard_profile_template'
-        run: make update extract
-      - run: make
-      # Disable linkcheck as it is too slow for development.
-      # - run: |
-      #     make linkcheck
-      #     rm -f output.json output.txt
+    uses: open-contracting/.github/.github/workflows/ci-profile.yml@main
+    secrets:
+      private-key: ${{ secrets.PRIVATE_KEY }}
+      elasticsearch-password: ${{ secrets.ELASTICSEARCH_PASSWORD }}
+    with:
+      path-prefix: ''
+      version: '1.1'
+      production-refs: '["refs/heads/1.0", "refs/heads/1.1"]'
+      # Linkcheck is slow for development.
+      linkcheck: false
       # "ResourceWarning: unclosed file <_io.BufferedWriter name='/dev/null'>"
-      - run: pytest -W error -W ignore::ResourceWarning
-      # Deploy the built documentation to the staging directory.
-      - if: github.event_name == 'push'
-        uses: shimataro/ssh-key-action@v2
-        with:
-          key: ${{ secrets.PRIVATE_KEY }}
-          known_hosts: standard.open-contracting.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGveFGTJ9yyObNGDUCUyzyFkm6Kzh3YqIt1qB7B/KU6E
-      - if: github.event_name == 'push'
-        uses: bcomnes/netrc-creds@v3
-        with:
-          machine: standard.open-contracting.org
-          login: manage
-          password: ${{ secrets.ELASTICSEARCH_PASSWORD }}
-      - if: github.event_name == 'push' && success() && github.repository != 'open-contracting/standard_profile_template'
-        env:
-          PATH_PREFIX: ""
-          PRODUCTION: ${{ startsWith(github.ref, 'refs/tags') || github.ref == 'refs/heads/latest' || github.ref == 'refs/heads/1.0' || github.ref == 'refs/heads/1.1' }}
-          RELEASE: ${{ startsWith(github.ref, 'refs/tags') }}
-          VERSION: "1.1"
-        shell: bash
-        run: curl -sS https://raw.githubusercontent.com/open-contracting/deploy/main/deploy-docs.sh | bash -
+      pytest-options: -W ignore::ResourceWarning
diff --git a/.github/workflows/js.yml b/.github/workflows/js.yml
index 4c8147e26..f0d0e38b5 100644
--- a/.github/workflows/js.yml
+++ b/.github/workflows/js.yml
@@ -1,10 +1,7 @@
 name: Lint JavaScript
 on: [push, pull_request]
 jobs:
-  build:
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: biomejs/setup-biome@v2
-      - run: biome ci --indent-style=space --line-width=119 docs/_static/script.js
+  lint:
+    uses: open-contracting/.github/.github/workflows/js.yml@main
+    with:
+      filenames: docs/_static/script.js
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 621563ce9..600ad9d5a 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,33 +1,11 @@
 name: Lint
 on: [push, pull_request]
-env:
-  BASEDIR: https://raw.githubusercontent.com/open-contracting/standard-maintenance-scripts/main
 jobs:
-  build:
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
-    runs-on: ubuntu-latest
-    env:
-      PAT: ${{ secrets.PAT }}
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          token: ${{ secrets.PAT || github.token }}
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.10'
-          cache: pip
-          cache-dependency-path: '**/requirements*.txt'
-      - id: changed-files
-        uses: tj-actions/changed-files@v45
-      - uses: pre-commit/action@v3.0.1
-        continue-on-error: true
-        with:
-          extra_args: pip-compile --files ${{ steps.changed-files.outputs.all_changed_files }}
-      - if: ${{ env.PAT }}
-        uses: stefanzweifel/git-auto-commit-action@v5
-        with:
-          commit_message: '[github-actions] pre-commit autoupdate'
-      - shell: bash
-        run: curl -s -S --retry 3 $BASEDIR/tests/install.sh | bash -
-      - shell: bash
-        run: curl -s -S --retry 3 $BASEDIR/tests/script.sh | bash -
+  lint:
+    uses: open-contracting/.github/.github/workflows/lint.yml@main
+    permissions:
+      contents: write
+    secrets:
+      personal-access-token: ${{ secrets.PAT }}
+    with:
+      python-version: '3.10'
diff --git a/.github/workflows/shell.yml b/.github/workflows/shell.yml
index fe96765b8..dfdb0acfb 100644
--- a/.github/workflows/shell.yml
+++ b/.github/workflows/shell.yml
@@ -1,14 +1,5 @@
 name: Lint Shell
 on: [push, pull_request]
 jobs:
-  build:
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - run: |
-          sudo apt update
-          sudo apt install devscripts shellcheck shfmt
-      - run: checkbashisms $(shfmt -f .)
-      - run: shellcheck $(shfmt -f .)
-      - run: shfmt -d -i 4 -sr $(shfmt -f .)
+  lint:
+    uses: open-contracting/.github/.github/workflows/shell.yml@main
diff --git a/.github/workflows/spellcheck.yml b/.github/workflows/spellcheck.yml
index b60b28a2b..d67a6d01e 100644
--- a/.github/workflows/spellcheck.yml
+++ b/.github/workflows/spellcheck.yml
@@ -1,13 +1,8 @@
 name: Spell-check
 on: [push, pull_request]
 jobs:
-  build:
-    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.10'
-      - run: pip install codespell
-      - run: codespell -S .git,docson,locale,examples,country.csv,currency.csv,language.csv,mediaType.csv -L fo,sme,zar,SME .
+  lint:
+    uses: open-contracting/.github/.github/workflows/spellcheck.yml@main
+    with:
+      ignore: fo,sme,zar
+      skip: docson,locale,examples,country.csv,currency.csv,language.csv,mediaType.csv
diff --git a/common-requirements.txt b/common-requirements.txt
index 9dd5cffd2..3ca01e41a 100644
--- a/common-requirements.txt
+++ b/common-requirements.txt
@@ -90,7 +90,7 @@ myst-parser==0.18.1
     # via -r common-requirements.in
 ocds-babel==0.3.6
     # via -r common-requirements.in
-ocdsextensionregistry==0.5.0
+ocdsextensionregistry==0.6.5
     # via -r common-requirements.in
 ocdsindex==0.2.0
     # via -r common-requirements.in
@@ -158,7 +158,7 @@ sphinxcontrib-qthelp==1.0.3
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
-standard-theme @ git+https://github.com/open-contracting/standard_theme.git@07ca0e39979a244656dd6df0658f2ead428184b9#egg=standard_theme
+standard-theme @ git+https://github.com/open-contracting/standard_theme.git@5de343d1d8e342b5f2a42c6132db37aebe382e36#egg=standard_theme
     # via -r common-requirements.in
 starlette==0.40.0
     # via sphinx-autobuild
diff --git a/docs/conf.py b/docs/conf.py
index 5f8d438c2..98d1c159b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -6,10 +6,6 @@
 
 # -- Path setup --------------------------------------------------------------
 
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-
 import csv
 import json
 import os
@@ -24,12 +20,12 @@
 
 # -- Project information -----------------------------------------------------
 
-project = 'Open Contracting Data Standard'
-copyright = 'Open Contracting Partnership'
-author = 'Open Contracting Partnership'
+project = "Open Contracting Data Standard"
+copyright = "Open Contracting Partnership"
+author = "Open Contracting Partnership"
 
-version = '1.1'
-release = '1.1.5'
+version = "1.1"
+release = "1.1.5"
 
 
 # -- General configuration ---------------------------------------------------
@@ -38,21 +34,21 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'myst_parser',
-    'sphinx.ext.ifconfig',
-    'sphinxcontrib.jsonschema',
-    'sphinxcontrib.opencontracting',
-    'sphinxcontrib.opendataservices',
-    'sphinx_design',
+    "myst_parser",
+    "sphinx.ext.ifconfig",
+    "sphinxcontrib.jsonschema",
+    "sphinxcontrib.opencontracting",
+    "sphinxcontrib.opendataservices",
+    "sphinx_design",
 ]
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store', '**/docson/[!p]**', '**/docson/package*.json']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store", "**/docson/[!p]**", "**/docson/package*.json"]
 
 
 # -- Options for HTML output -------------------------------------------------
@@ -60,82 +56,81 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'standard_theme'  # 'pydata_sphinx_theme'
+html_theme = "standard_theme"  # 'pydata_sphinx_theme'
 html_theme_path = [standard_theme.get_html_theme_path()]
-html_favicon = '_static/favicon-16x16.ico'
+html_favicon = "_static/favicon-16x16.ico"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 
 # -- Local configuration -----------------------------------------------------
 
-_ = get_translation('theme')
+_ = get_translation("theme")
 
-profile_identifier = ''
-repository_url = 'https://github.com/open-contracting/standard'
+profile_identifier = ""
+repository_url = "https://github.com/open-contracting/standard"
 
 # Internationalization.
 gettext_compact = False
 # `DOMAIN_PREFIX` from `config.mk`.
-gettext_domain_prefix = f'{profile_identifier}-' if profile_identifier else ''
-locale_dirs = ['locale/', os.path.join(standard_theme.get_html_theme_path(), 'locale')]
+gettext_domain_prefix = f"{profile_identifier}-" if profile_identifier else ""
+locale_dirs = ["locale/", os.path.join(standard_theme.get_html_theme_path(), "locale")]
 # We use single quotes for codes, which docutils will change to double quotes.
 # https://sourceforge.net/p/docutils/code/HEAD/tree/trunk/docutils/docutils/utils/smartquotes.py
 smartquotes = False
 
 # MyST configuration.
-myst_enable_extensions = ['linkify']
+myst_enable_extensions = ["linkify"]
 myst_heading_anchors = 6
 myst_heading_slug_func = make_id
 # https://github.com/executablebooks/MyST-Parser/issues/357
-suppress_warnings = ['myst.anchor']
+suppress_warnings = ["myst.anchor"]
 
 # Theme customization.
 navigation_with_keys = False  # restore the Sphinx default
 html_context = {
-    'analytics_id': 'HTWZHRIZ',
+    "analytics_id": "HTWZHRIZ",
 }
 html_theme_options = {
-    'analytics_id': 'HTWZHRIZ',
-    'display_version': True,
-    'root_url': f'/profiles/{profile_identifier}' if profile_identifier else '',
-    'short_project': project.replace('Open Contracting Data Standard', 'OCDS'),
-    'copyright': copyright,
-    'license_name': 'Apache License 2.0',
-    'license_url': f'{repository_url}/blob/HEAD/LICENSE',
-    'repository_url': repository_url,
+    "analytics_id": "HTWZHRIZ",
+    "display_version": True,
+    "root_url": f"/profiles/{profile_identifier}" if profile_identifier else "",
+    "short_project": project.replace("Open Contracting Data Standard", "OCDS"),
+    "copyright": copyright,
+    "license_name": "Apache License 2.0",
+    "license_url": f"{repository_url}/blob/HEAD/LICENSE",
+    "repository_url": repository_url,
 }
-html_short_title = f'{html_theme_options["short_project"]} v{release}'
+html_short_title = f"{html_theme_options['short_project']} v{release}"
 
 # List the extension identifiers and versions that should be part of this specification. The extensions must be in
 # the extension registry: https://github.com/open-contracting/extension_registry/blob/main/extension_versions.csv
-default_extension_version = f'v{release}'
+default_extension_version = f"v{release}"
 extension_versions = {
-    'bids': default_extension_version,
-    'enquiries': default_extension_version,
-    'location': default_extension_version,
-    'lots': default_extension_version,
-    'milestone_documents': default_extension_version,
-    'participation_fee': default_extension_version,
-    'process_title': default_extension_version,
+    "bids": default_extension_version,
+    "enquiries": default_extension_version,
+    "location": default_extension_version,
+    "lots": default_extension_version,
+    "participation_fee": default_extension_version,
+    "process_title": default_extension_version,
 }
 
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-the-linkcheck-builder
 # Ignore Google Sheets.
-linkcheck_anchors_ignore = [r'^gid=']
+linkcheck_anchors_ignore = [r"^gid="]
 linkcheck_ignore = [
     # Avoid GitHub.com rate limiting.
-    r'^https://github.com/open-contracting/standard/(?:issues|pull)/\d+$',
+    r"^https://github.com/open-contracting/standard/(?:issues|pull)/\d+$",
     # Ignore irreproducible false positives.
-    r'^https://www.fcny.org/fcny/$',
-    r'^http://www.eprocurementtoolkit.org/sites/default/files/2016-11/OCDS_Implemetation_Methodology_0.pdf#page=27$',
+    r"^https://www.fcny.org/fcny/$",
+    r"^http://www.eprocurementtoolkit.org/sites/default/files/2016-11/OCDS_Implemetation_Methodology_0.pdf#page=27$",
     # Ignore unwanted links created by linkify.
-    r'^http://vnd\.',
+    r"^http://vnd\.",
     # Ignore expected redirects.
-    r'^https://docs.google.com/spreadsheets/d/[^/]+/pub?gid=\d+&single=true&output=csv$',
+    r"^https://docs.google.com/spreadsheets/d/[^/]+/pub?gid=\d+&single=true&output=csv$",
 ]
 
 
@@ -143,32 +138,38 @@ def setup(app):
     # The root of the repository.
     basedir = Path(__file__).resolve().parents[1]
     # `LOCALE_DIR` from `config.mk`.
-    localedir = basedir / 'docs' / 'locale'
+    localedir = basedir / "docs" / "locale"
 
-    language = app.config.overrides.get('language', 'en')
+    language = app.config.overrides.get("language", "en")
 
-    headers = ['Title', 'Description', 'Extension']
+    headers = ["Title", "Description", "Extension"]
     # The gettext domain for schema translations. Should match the domain in the `pybabel compile` command.
-    schema_domain = f'{gettext_domain_prefix}schema'
+    schema_domain = f"{gettext_domain_prefix}schema"
     # The gettext domain for codelist translations. Should match the domain in the `pybabel compile` command.
-    codelists_domain = f'{gettext_domain_prefix}codelists'
-
-    standard_dir = basedir / 'schema'
-    standard_build_dir = basedir / 'build' / language
-
-    branch = os.getenv('GITHUB_REF_NAME', 'latest')
-
-    translate([
-        # The glob patterns in `babel_ocds_schema.cfg` should match these filenames.
-        (glob(str(standard_dir / '*-schema.json')), standard_build_dir, schema_domain),
-        # The glob patterns in `babel_ocds_codelist.cfg` should match these.
-        (glob(str(standard_dir / 'codelists' / '*.csv')), standard_build_dir / 'codelists', codelists_domain),
-    ], localedir, language, headers, version=branch)
-
-    with (standard_build_dir / 'release-schema.json').open() as f:
+    codelists_domain = f"{gettext_domain_prefix}codelists"
+
+    standard_dir = basedir / "schema"
+    standard_build_dir = basedir / "build" / language
+
+    branch = os.getenv("GITHUB_REF_NAME", "latest")
+
+    translate(
+        [
+            # The glob patterns in `babel_ocds_schema.cfg` should match these filenames.
+            (glob(str(standard_dir / "*-schema.json")), standard_build_dir, schema_domain),
+            # The glob patterns in `babel_ocds_codelist.cfg` should match these.
+            (glob(str(standard_dir / "codelists" / "*.csv")), standard_build_dir / "codelists", codelists_domain),
+        ],
+        localedir,
+        language,
+        headers,
+        version=branch,
+    )
+
+    with (standard_build_dir / "release-schema.json").open() as f:
         fieldnames, rows = mapping_sheet(json.load(f), infer_required=True)
 
-    with (standard_build_dir / 'release-schema.csv').open('w') as f:
+    with (standard_build_dir / "release-schema.csv").open("w") as f:
         writer = csv.DictWriter(f, fieldnames)
         writer.writeheader()
         writer.writerows(rows)
diff --git a/docs/history/changelog.md b/docs/history/changelog.md
index a717f9dc2..d97ea9573 100644
--- a/docs/history/changelog.md
+++ b/docs/history/changelog.md
@@ -402,7 +402,7 @@ See the changelogs for:
 * [Enquiries](https://extensions.open-contracting.org/en/extensions/enquiries/master/#changelog)
 * [Location](https://extensions.open-contracting.org/en/extensions/location/master/#changelog)
 * [Lots](https://extensions.open-contracting.org/en/extensions/lots/master/#changelog)
-* [Milestone documents](https://extensions.open-contracting.org/en/extensions/milestone_documents/master/#changelog)
+* [Milestone documents](https://github.com/open-contracting-extensions/ocds_milestone_documents_extension#changelog)
 * [Participation fees](https://extensions.open-contracting.org/en/extensions/participation_fee/master/#changelog)
 * [Process level title and description](https://extensions.open-contracting.org/en/extensions/process_title/master/#changelog)
 
diff --git a/docs/locale/es/LC_MESSAGES/history/changelog.po b/docs/locale/es/LC_MESSAGES/history/changelog.po
index e99fd7d4b..7a2399215 100644
--- a/docs/locale/es/LC_MESSAGES/history/changelog.po
+++ b/docs/locale/es/LC_MESSAGES/history/changelog.po
@@ -792,11 +792,9 @@ msgstr ""
 
 #: ../../docs/history/changelog.md:111
 msgid ""
-"[Milestone documents](https://extensions.open-"
-"contracting.org/en/extensions/milestone_documents/master/#changelog)"
+"[Milestone documents](https://github.com/open-contracting-extensions/ocds_milestone_documents_extension#changelog)"
 msgstr ""
-"[Documentos de hito](https://extensions.open-"
-"contracting.org/en/extensions/milestone_documents/master/#changelog)"
+"[Documentos de hito](https://github.com/open-contracting-extensions/ocds_milestone_documents_extension#changelog)"
 
 #: ../../docs/history/changelog.md:112 ../../docs/history/changelog.md:190
 msgid ""
diff --git a/docs/locale/fr/LC_MESSAGES/history/changelog.po b/docs/locale/fr/LC_MESSAGES/history/changelog.po
index 9863d3c23..2eb30a8d7 100644
--- a/docs/locale/fr/LC_MESSAGES/history/changelog.po
+++ b/docs/locale/fr/LC_MESSAGES/history/changelog.po
@@ -601,8 +601,7 @@ msgstr ""
 
 #: ../../docs/history/changelog.md:110
 msgid ""
-"[Milestone documents](https://extensions.open-"
-"contracting.org/en/extensions/milestone_documents/master/#changelog)"
+"[Milestone documents](https://github.com/open-contracting-extensions/ocds_milestone_documents_extension#changelog)"
 msgstr ""
 
 #: ../../docs/history/changelog.md:111 ../../docs/history/changelog.md:189
diff --git a/docs/schema/reference.md b/docs/schema/reference.md
index 698b4754c..e53f6b44a 100644
--- a/docs/schema/reference.md
+++ b/docs/schema/reference.md
@@ -629,10 +629,6 @@ For delivery milestones, if there is a time frame for delivery, use `.dueAfterDa
 :collapse: documents
 ```
 
-```{extensionlist} The following extensions to milestone are available
-:list: milestones
-```
-
 ```{workedexamplelist} The following worked examples are available for milestones
 :tag: milestone
 ```
diff --git a/manage.py b/manage.py
index 9969859b9..dc2ffe475 100755
--- a/manage.py
+++ b/manage.py
@@ -9,20 +9,20 @@
 import warnings
 from collections import defaultdict
 from contextlib import contextmanager
-from copy import deepcopy
 from glob import glob
 from io import StringIO
 from pathlib import Path
 
 import click
 import json_merge_patch
-import jsonref
 import lxml.etree
 import lxml.html
 import requests
 from babel.messages.pofile import read_po
 from docutils.utils import relative_path
 from lxml import etree
+from ocdsextensionregistry import get_versioned_release_schema
+from ocdsextensionregistry.util import replace_refs
 from ocdskit.schema import get_schema_fields
 
 basedir = Path(__file__).resolve().parent
@@ -40,82 +40,11 @@ def custom_warning_formatter(message, category, filename, lineno, line=None):
 
 warnings.formatwarning = custom_warning_formatter
 
-versioned_template = json.loads("""
-{
-  "type": "array",
-  "items": {
-    "type": "object",
-    "properties": {
-      "releaseDate": {
-        "format": "date-time",
-        "type": "string"
-      },
-      "releaseID": {
-        "type": "string"
-      },
-      "value": {},
-      "releaseTag": {
-        "type": "array",
-        "items": {
-          "type": "string"
-        }
-      }
-    }
-  }
-}
-""")
-
-common_versioned_definitions = {
-    "StringNullUriVersioned": {
-        "type": ["string", "null"],
-        "format": "uri",
-    },
-    "StringNullDateTimeVersioned": {
-        "type": ["string", "null"],
-        "format": "date-time",
-    },
-    "StringNullVersioned": {
-        "type": ["string", "null"],
-        "format": None,
-    },
-}
-
-recognized_types = (
-    # Array
-    ["array"],
-    ["array", "null"],  # optional string arrays
-    # Object
-    ["object"],
-    ["object", "null"],  # /Organization/details
-    # String
-    ["string"],
-    ["string", "null"],
-    # Literal
-    ["boolean", "null"],
-    ["integer", "null"],
-    ["number", "null"],
-    # Mixed
-    ["string", "integer"],
-    ["string", "integer", "null"],
-)
-
-keywords_to_remove = (
-    # Metadata keywords
-    # https://tools.ietf.org/html/draft-fge-json-schema-validation-00#section-6
-    "title",
-    "description",
-    "default",
-    # Extended keywords
-    # http://os4d.opendataservices.coop/development/schema/#extended-json-schema
-    "omitWhenMerged",
-    "wholeListMerge",
-)
-
-
-def json_load(filename, library=json, **kwargs):
+
+def json_load(filename):
     """Load JSON data from the given filename."""
     with (schemadir / filename).open() as f:
-        return library.load(f, **kwargs)
+        return json.load(f)
 
 
 def json_dump(filename, data):
@@ -149,14 +78,6 @@ def get(url):
     return response
 
 
-def coerce_to_list(data, key):
-    """Return the value of the ``key`` key in the ``data`` mapping. If the value is a string, wrap it in an array."""
-    item = data.get(key, [])
-    if isinstance(item, str):
-        return [item]
-    return item
-
-
 def get_metaschema():
     """Patches and returns the JSON Schema Draft 4 metaschema."""
     return json_merge_patch.merge(
@@ -164,234 +85,6 @@ def get_metaschema():
     )
 
 
-def get_common_definition_ref(item):
-    """
-    Return a schema that references the common definition that the ``item`` matches: "StringNullUriVersioned",
-    "StringNullDateTimeVersioned" or "StringNullVersioned".
-    """
-    for name, keywords in common_versioned_definitions.items():
-        # If the item matches the definition.
-        if any(item.get(keyword) != value for keyword, value in keywords.items()):
-            continue
-        # And adds no keywords to the definition.
-        if any(keyword not in {*keywords, *keywords_to_remove} for keyword in item):
-            continue
-        return {"$ref": f"#/definitions/{name}"}
-    return None
-
-
-def add_versioned(schema, unversioned_pointers, pointer=""):
-    """Call ``_add_versioned`` on each field."""
-    for key, value in schema["properties"].items():
-        new_pointer = f"{pointer}/properties/{key}"
-        _add_versioned(schema, unversioned_pointers, new_pointer, key, value)
-
-    for key, value in schema.get("definitions", {}).items():
-        new_pointer = f"{pointer}/definitions/{key}"
-        add_versioned(value, unversioned_pointers, pointer=new_pointer)
-
-
-def _add_versioned(schema, unversioned_pointers, pointer, key, value):
-    """
-    Perform the changes to the schema to refer to versioned/unversioned definitions.
-
-    :param schema dict: the schema of the object on which the field is defined
-    :param unversioned_pointers set: JSON Pointers to ``id`` fields to leave unversioned if the object is in an array
-    :param pointer str: the field's pointer
-    :param key str: the field's name
-    :param value str: the field's schema
-    """
-    # Skip unversioned fields.
-    if pointer in unversioned_pointers:
-        return
-
-    types = coerce_to_list(value, "type")
-
-    # If a type is unrecognized, we might need to update this script.
-    if (
-        "$ref" not in value
-        and types not in recognized_types
-        and not (pointer == "/definitions/Quantity/properties/value" and types == ["string", "number", "null"])
-    ):
-        warnings.warn(f"{pointer} has unrecognized type {types}")
-
-    # For example, if $ref is used.
-    if not types:
-        # Ignore the `amendment` field, which had no `id` field in OCDS 1.0.
-        if "deprecated" not in value:
-            versioned_pointer = f"{value['$ref'][1:]}/properties/id"
-            # If the `id` field is on an object not in an array, it needs to be versioned (e.g. buyer/properties/id).
-            if versioned_pointer in unversioned_pointers:
-                value["$ref"] = value["$ref"] + "VersionedId"
-        return
-
-    # Reference a common versioned definition if possible, to limit the size of the schema.
-    ref = get_common_definition_ref(value)
-    if ref:
-        schema["properties"][key] = ref
-
-    # Iterate into objects with properties like `Item.unit`. Otherwise, version objects with no properties as a
-    # whole, like `Organization.details`.
-    elif types == ["object"] and "properties" in value:
-        add_versioned(value, unversioned_pointers, pointer=pointer)
-
-    else:
-        new_value = deepcopy(value)
-
-        if types == ["array"]:
-            item_types = coerce_to_list(value["items"], "type")
-
-            # See https://standard.open-contracting.org/latest/en/schema/merging/#whole-list-merge
-            if value.get("wholeListMerge"):
-                # Update `$ref` to the unversioned definition.
-                if "$ref" in value["items"]:
-                    new_value["items"]["$ref"] = value["items"]["$ref"] + "Unversioned"
-                # Otherwise, similarly, don't iterate over item properties.
-            # See https://standard.open-contracting.org/latest/en/schema/merging/#lists
-            elif "$ref" in value["items"]:
-                # Leave `$ref` to the versioned definition.
-                return
-            # Exceptional case for deprecated `Amendment.changes`.
-            elif item_types == ["object"] and pointer == "/definitions/Amendment/properties/changes":
-                return
-            # Warn in case new combinations are added to the release schema.
-            elif item_types != ["string"]:
-                # Note: Versioning the properties of un-$ref'erenced objects in arrays isn't implemented. However,
-                # this combination hasn't occurred, with the exception of `Amendment/changes`.
-                warnings.warn(f"{pointer}/items has unexpected type {item_types}")
-
-        versioned = deepcopy(versioned_template)
-        versioned["items"]["properties"]["value"] = new_value
-        schema["properties"][key] = versioned
-
-
-def update_refs_to_unversioned_definitions(schema):
-    """Replace ``$ref`` values with unversioned definitions."""
-    for key, value in schema.items():
-        if key == "$ref":
-            schema[key] = value + "Unversioned"
-        elif isinstance(value, dict):
-            update_refs_to_unversioned_definitions(value)
-
-
-def get_unversioned_pointers(schema, fields, pointer=""):
-    """Return the JSON Pointers to ``id`` fields that must not be versioned if the object is in an array."""
-    if isinstance(schema, list):
-        for index, item in enumerate(schema):
-            get_unversioned_pointers(item, fields, pointer=f"{pointer}/{index}")
-    elif isinstance(schema, dict):
-        # Follows the logic of _get_merge_rules in merge.py from ocds-merge.
-        types = coerce_to_list(schema, "type")
-
-        # If an array is whole list merge, its items are unversioned.
-        if "array" in types and schema.get("wholeListMerge"):
-            return
-        if "array" in types and "items" in schema:
-            item_types = coerce_to_list(schema["items"], "type")
-            # If an array mixes objects and non-objects, it is whole list merge.
-            if any(item_type != "object" for item_type in item_types):
-                return
-            # If it is an array of objects, any `id` fields are unversioned.
-            if "id" in schema["items"]["properties"]:
-                if hasattr(schema["items"], "__reference__"):
-                    reference = schema["items"].__reference__["$ref"][1:]
-                else:
-                    reference = pointer
-                fields.add(f"{reference}/properties/id")
-
-        for key, value in schema.items():
-            get_unversioned_pointers(value, fields, pointer=f"{pointer}/{key}")
-
-
-def remove_omit_when_merged(schema):
-    """Remove properties that set ``omitWhenMerged``."""
-    if isinstance(schema, list):
-        for item in schema:
-            remove_omit_when_merged(item)
-    elif isinstance(schema, dict):
-        for key, value in schema.items():
-            if key == "properties":
-                for prop in list(value):
-                    if value[prop].get("omitWhenMerged"):
-                        del value[prop]
-                        if prop in schema["required"]:
-                            schema["required"].remove(prop)
-            remove_omit_when_merged(value)
-
-
-def remove_metadata_and_extended_keywords(schema):
-    """Remove metadata and extended keywords from properties and definitions."""
-    if isinstance(schema, list):
-        for item in schema:
-            remove_metadata_and_extended_keywords(item)
-    elif isinstance(schema, dict):
-        for key, value in schema.items():
-            if key in {"definitions", "properties"}:
-                for subschema in value.values():
-                    for keyword in keywords_to_remove:
-                        subschema.pop(keyword, None)
-            remove_metadata_and_extended_keywords(value)
-
-
-def get_versioned_release_schema(schema):
-    """Return the versioned release schema."""
-    # Update schema metadata.
-    release_with_underscores = release.replace(".", "__")
-    schema["id"] = (
-        f"https://standard.open-contracting.org/schema/{release_with_underscores}/versioned-release-validation-schema.json"
-    )
-    schema["title"] = "Schema for a compiled, versioned Open Contracting Release."
-
-    # Release IDs, dates and tags appear alongside values in the versioned release schema.
-    remove_omit_when_merged(schema)
-
-    # Create unversioned copies of all definitions.
-    unversioned_definitions = {k + "Unversioned": deepcopy(v) for k, v in schema["definitions"].items()}
-    update_refs_to_unversioned_definitions(unversioned_definitions)
-
-    # Determine which `id` fields occur on objects in arrays.
-    unversioned_pointers = set()
-    get_unversioned_pointers(jsonref.replace_refs(schema), unversioned_pointers)
-
-    # Omit `ocid` from versioning.
-    ocid = schema["properties"].pop("ocid")
-    add_versioned(schema, unversioned_pointers)
-    schema["properties"]["ocid"] = ocid
-
-    # Add the common versioned definitions.
-    for name, keywords in common_versioned_definitions.items():
-        versioned = deepcopy(versioned_template)
-        for keyword, value in keywords.items():
-            if value:
-                versioned["items"]["properties"]["value"][keyword] = value
-        schema["definitions"][name] = versioned
-
-    # Add missing definitions.
-    while True:
-        try:
-            jsonref.replace_refs(schema, lazy_load=False)
-            break
-        except jsonref.JsonRefError as e:
-            name = e.cause.args[0]
-
-            if name.endswith("VersionedId"):
-                # Add a copy of an definition with a versioned `id` field, using the same logic as before.
-                definition = deepcopy(schema["definitions"][name[:-11]])
-                pointer = f"/definitions/{name[:-11]}/properties/id"
-                pointers = unversioned_pointers - {pointer}
-                _add_versioned(definition, pointers, pointer, "id", definition["properties"]["id"])
-            else:
-                # Add a copy of an definition with no versioned fields.
-                definition = unversioned_definitions[name]
-
-            schema["definitions"][name] = definition
-
-    # Remove all metadata and extended keywords.
-    remove_metadata_and_extended_keywords(schema)
-
-    return schema
-
-
 @click.group()
 def cli():
     pass
@@ -516,14 +209,14 @@ def pre_commit():
     }
 
     release_schema = json_load("release-schema.json")
-    jsonref_release_schema = json_load("release-schema.json", jsonref, merge_props=True)
+    jsonref_release_schema = replace_refs(json_load("release-schema.json"), keep_defs=True)
 
     counts = defaultdict(list)
     nonstring = ("boolean", "integer", "number", "object")
     for field in get_schema_fields(jsonref_release_schema):
         name = field.path_components[-1]
         # Skip definitions (output dereferenced properties only). Skip deprecated fields.
-        if field.definition_pointer_components or field.deprecated:
+        if field.definition or field.deprecated:
             continue
         multilingual = (
             # If a field can be a non-string, it is not multilingual.
@@ -566,7 +259,10 @@ def pre_commit():
 
     json_dump("meta-schema.json", get_metaschema())
     json_dump("dereferenced-release-schema.json", jsonref_release_schema)
-    json_dump("versioned-release-validation-schema.json", get_versioned_release_schema(release_schema))
+    json_dump(
+        "versioned-release-validation-schema.json",
+        get_versioned_release_schema(release_schema, release.replace(".", "__")),
+    )
 
 
 @cli.command()
diff --git a/requirements.txt b/requirements.txt
index 9c2ea5690..33d3d98dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,8 +2,8 @@
 
 # Add your own requirements below.
 
-ocdskit==1.1.3
+ocdskit==1.3.0
 sphinx-design==0.4.1
 sphinxcontrib-opencontracting==0.0.8
-sphinxcontrib-opendataservices-jsonschema==0.6.1
+sphinxcontrib-opendataservices-jsonschema==0.7.1
 sphinxcontrib-opendataservices==0.5.0
diff --git a/schema/dereferenced-release-schema.json b/schema/dereferenced-release-schema.json
index f71c5592f..d3df697bd 100644
--- a/schema/dereferenced-release-schema.json
+++ b/schema/dereferenced-release-schema.json
@@ -4128,7 +4128,7 @@
                           "number",
                           "null"
                         ],
-                        "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                        "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                       }
                     },
                     "minProperties": 1
@@ -10087,7 +10087,7 @@
                             "number",
                             "null"
                           ],
-                          "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                          "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                         }
                       },
                       "minProperties": 1
@@ -12641,7 +12641,7 @@
                             "number",
                             "null"
                           ],
-                          "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                          "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                         }
                       },
                       "minProperties": 1
@@ -19734,7 +19734,7 @@
                           "number",
                           "null"
                         ],
-                        "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                        "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                       }
                     },
                     "minProperties": 1
@@ -25689,7 +25689,7 @@
                           "number",
                           "null"
                         ],
-                        "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                        "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                       }
                     },
                     "minProperties": 1
@@ -28237,7 +28237,7 @@
                           "number",
                           "null"
                         ],
-                        "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                        "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                       }
                     },
                     "minProperties": 1
@@ -39413,7 +39413,7 @@
                     "number",
                     "null"
                   ],
-                  "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                  "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
                 }
               },
               "minProperties": 1
@@ -41378,7 +41378,7 @@
                 "number",
                 "null"
               ],
-              "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+              "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
             }
           },
           "minProperties": 1
@@ -41428,7 +41428,7 @@
             "number",
             "null"
           ],
-          "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+          "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
         }
       },
       "minProperties": 1
diff --git a/schema/release-schema.json b/schema/release-schema.json
index 46f3ea6d8..5260ed095 100644
--- a/schema/release-schema.json
+++ b/schema/release-schema.json
@@ -2828,7 +2828,7 @@
             "number",
             "null"
           ],
-          "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+          "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
         }
       },
       "minProperties": 1
diff --git a/schema/versioned-release-validation-schema.json b/schema/versioned-release-validation-schema.json
index 55b8de369..6f30442d7 100644
--- a/schema/versioned-release-validation-schema.json
+++ b/schema/versioned-release-validation-schema.json
@@ -3308,7 +3308,7 @@
                   "number",
                   "null"
                 ],
-                "pattern": "^[([\\]][0-9]+,([0-9]+|INF)[)[\\]]$"
+                "pattern": "^[(\\[\\]][0-9]+,([0-9]+|INF)[)\\[\\]]$"
               },
               "releaseTag": {
                 "type": "array",
diff --git a/script/diff b/script/diff
index cf7e85060..85fb10c99 100755
--- a/script/diff
+++ b/script/diff
@@ -5,7 +5,7 @@ set -u
 
 curl -sS https://raw.githubusercontent.com/open-contracting/standard_profile_template/latest/docs/conf.py | diff -u - docs/conf.py
 
-for f in .github/workflows/ci.yml .github/workflows/js.yml .github/workflows/spellcheck.yml include/config.mk; do
+for f in .github/workflows/ci.yml .github/workflows/spellcheck.yml include/config.mk; do
     curl -sS https://raw.githubusercontent.com/open-contracting/standard_profile_template/latest/$f | diff -u - $f
 done
 
diff --git a/tests/__init__.py b/tests/__init__.py
index fc301d0a9..29bd6731d 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,17 +1,17 @@
 languages = {
-    'en': 'English',
-    'es': 'Español',
-    'fr': 'Français',
+    "en": "English",
+    "es": "Español",
+    "fr": "Français",
 }
 
 test_basic_params = {
-    'en': 'Open Contracting Data Standard',
-    'es': 'Estándar de Datos para las Contrataciones Abiertas',
-    'fr': 'Standard de Données sur la Commande Publique Ouverte',
+    "en": "Open Contracting Data Standard",
+    "es": "Estándar de Datos para las Contrataciones Abiertas",
+    "fr": "Standard de Données sur la Commande Publique Ouverte",
 }
 
 test_search_params = [
-    ('en', r'found \d+ page\(s\) matching'),
+    ("en", r"found \d+ page\(s\) matching"),
     # See https://github.com/sphinx-doc/sphinx/issues/11008
     # ('es', r'encontraron \d+ páginas que coinciden'),  # noqa: ERA001
     # ('fr', r'\d+ page\(s\) correspondant'),  # noqa: ERA001
diff --git a/tests/test_schema_integrity.py b/tests/test_schema_integrity.py
index 39ed3bd6e..fdbab6b76 100644
--- a/tests/test_schema_integrity.py
+++ b/tests/test_schema_integrity.py
@@ -3,38 +3,43 @@
 """
 
 import json
-import os.path
 import sys
+from pathlib import Path
 
 import jsonref
+from ocdsextensionregistry import get_versioned_release_schema
 
-sys.path.append(os.path.dirname(os.path.dirname(os.path.realpath(__file__))))
+basedir = Path(__file__).resolve().parent.parent
 
-from manage import get_metaschema, get_versioned_release_schema
+sys.path.extend([str(basedir), str(basedir / "docs")])
+
+from conf import release  # noqa: E402
+
+from manage import get_metaschema  # noqa: E402
 
 
 def test_versioned_release_schema_is_in_sync():
-    with open('schema/versioned-release-validation-schema.json') as f:
+    with open("schema/versioned-release-validation-schema.json") as f:
         actual = json.load(f)
 
-    with open('schema/release-schema.json') as f:
-        expected = get_versioned_release_schema(json.load(f))
+    with open("schema/release-schema.json") as f:
+        expected = get_versioned_release_schema(json.load(f), release.replace(".", "__"))
 
-    assert actual == expected, 'Run: python manage.py pre-commit'
+    assert actual == expected, "Run: python manage.py pre-commit"
 
 
 def test_dereferenced_release_schema_is_in_sync():
-    with open('schema/dereferenced-release-schema.json') as f:
+    with open("schema/dereferenced-release-schema.json") as f:
         actual = json.load(f)
 
-    with open('schema/release-schema.json') as f:
+    with open("schema/release-schema.json") as f:
         expected = jsonref.load(f, merge_props=True)
 
-    assert actual == expected, 'Run: python manage.py pre-commit'
+    assert actual == expected, "Run: python manage.py pre-commit"
 
 
 def test_meta_schema_is_in_sync():
-    with open('schema/meta-schema.json') as f:
+    with open("schema/meta-schema.json") as f:
         actual = json.load(f)
 
-    assert actual == get_metaschema(), 'Run: python manage.py pre-commit'
+    assert actual == get_metaschema(), "Run: python manage.py pre-commit"