diff --git a/mdl_strict.rb b/mdl_strict.rb
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+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# markdownlint(mdl) strict rules file
+# To use: `make LINT_STYLE=mdl_strict.rb lint`
+#
+# Rule descriptions:
+#  https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md
+# Instructions on modifying the rules file:
+#  https://github.com/markdownlint/markdownlint/blob/master/docs/creating_styles.md
+
+# use all rules
+all
+
+# Indent lists with 4 spaces
+rule 'MD007', :indent => 4
+
+# Don't enforce line length limitations within code blocks and tables
+rule 'MD013', :code_blocks => false, :tables => false
+
+# Allow  ! and ? as trailing punctuation in headers
+rule 'MD026', :punctuation => '.,;:'
+
+# Numbered lists should have the correct order
+rule 'MD029', :style => "ordered"
+