diff --git a/README_validations.md b/README_validations.md
index 7a64a1b122..76dbd75c08 100644
--- a/README_validations.md
+++ b/README_validations.md
@@ -26,7 +26,7 @@ For OSCAL XML, this schema syntax is [XML Schema Definition (XSD)](https://www.w
 
 Each tool will have its own way to provide for validation. Bindings or configurations to link documents to schemas can be maintained either inside or outside the documents themselves; many tools offer several ways to do this.
 
-Some tools support self-contained validation functionality without full-fledged application frameworks or development environments, with tools like [`xmllint`](http://xmlsoft.org/xmllint.html) offering command-line interfaces. Similarly, you can use the [`ajv-cli`](https://github.com/ajv-validator/ajv-cli) for JSON.
+Some tools support self-contained validation functionality without full-fledged application frameworks or development environments, with tools like [`xmllint`](https://linux.die.net/man/1/xmllint/) offering command-line interfaces. Similarly, you can use the [`ajv-cli`](https://github.com/ajv-validator/ajv-cli) for JSON.
 
 ## What does success look like?
 
diff --git a/build/ci-cd/README.md b/build/ci-cd/README.md
index 057dc8a4fb..28cbec8b26 100644
--- a/build/ci-cd/README.md
+++ b/build/ci-cd/README.md
@@ -65,8 +65,8 @@ Not every script above is run with every pull request as part of the CI/CD syste
 
 The bash scripts used in the CI/CD workflow can be run locally in the correct environment. In addition to a bash shell, to run these scripts the following must be installed:
 
-- [xmlint](http://xmlsoft.org/xmllint.html)
-- Java 8.0 or greater
+- [xmlint](https://linux.die.net/man/1/xmllint/)
+- Java 11 or greater
 - [Apache Maven](https://maven.apache.org/) 3.6.1 or greater
 - [Node.js and Node Package Manager (NPM)](https://nodejs.org/en/) 10.15.3 or greater
 - 'Another Json Validator' Command Line Interface ([ajv-cli](https://github.com/jessedc/ajv-cli)) v3.0.0 or greater
diff --git a/build/ci-cd/python/readme.md b/build/ci-cd/python/README.md
similarity index 97%
rename from build/ci-cd/python/readme.md
rename to build/ci-cd/python/README.md
index fdb9602d07..377a76d21a 100644
--- a/build/ci-cd/python/readme.md
+++ b/build/ci-cd/python/README.md
@@ -5,8 +5,8 @@ This code provides test coverage to validate the OSCAL artifacts as new document
 ### Pre-Requisites
 
 1. [Python 2.7.10 or greater](https://www.python.org/)
-2. [xmllint](http://xmlsoft.org/xmllint.html)
-3. Java 8.0 or greater
+2. [xmllint](https://linux.die.net/man/1/xmllint/)
+3. Java 11 or greater
 4. [Saxon 10 HE](http://saxon.sourceforge.net/)
 
 ### Instructions
diff --git a/docs/content/contribute/model-engineering-meeting/meeting-2020-05-07.md b/docs/content/contribute/model-engineering-meeting/meeting-2020-05-07.md
index 048a633316..f79bf9f0d7 100644
--- a/docs/content/contribute/model-engineering-meeting/meeting-2020-05-07.md
+++ b/docs/content/contribute/model-engineering-meeting/meeting-2020-05-07.md
@@ -19,4 +19,4 @@ sidenav:
 
 ## Notes
 
-- There is interest in having the model discussion. A Doodle pool will be sent to the oscal-dev@nist.gov mailing list to find a good day.
+- There is interest in having the model discussion. A Doodle pool will be sent to the oscal-dev@list.nist.gov mailing list to find a good day.
diff --git a/docs/content/contribute/model-engineering-meeting/meeting-2020-05-21.md b/docs/content/contribute/model-engineering-meeting/meeting-2020-05-21.md
index 20553b926c..534bdcd220 100644
--- a/docs/content/contribute/model-engineering-meeting/meeting-2020-05-21.md
+++ b/docs/content/contribute/model-engineering-meeting/meeting-2020-05-21.md
@@ -19,4 +19,4 @@ sidenav:
 
 ## Notes
 
-- The Doodle pool results show that Fridays @ 10am EDT are the best time to have the model review meeting. The OSCAL team will send out a meeting invite for this time to the oscal-dev@nist.gov mailing list.
+- The Doodle pool results show that Fridays @ 10am EDT are the best time to have the model review meeting. The OSCAL team will send out a meeting invite for this time to the [oscal-dev@list.nist.gov](mailto:oscal-dev@list.nist.gov) mailing list.
diff --git a/src/metaschema/oscal_implementation-common_metaschema.xml b/src/metaschema/oscal_implementation-common_metaschema.xml
index 8b7c811599..955ef966b5 100644
--- a/src/metaschema/oscal_implementation-common_metaschema.xml
+++ b/src/metaschema/oscal_implementation-common_metaschema.xml
@@ -109,6 +109,7 @@
                         <!-- ========================================================================================================== -->
             &allowed-values-component_component_link-rel;
                         <enum value="uses-network">This component uses the network provided by the identified network component.</enum>
+                        <enum value="imported-from">The hyperlink identifies a URI pointing to the <code>component</code> in a <code>component-definition</code> that originally defined the <code>component</code>.</enum>
                   </allowed-values>
 
                   <allowed-values target="responsible-role/@role-id" allow-other="yes">
diff --git a/src/metaschema/oscal_ssp_metaschema.xml b/src/metaschema/oscal_ssp_metaschema.xml
index 02489cf3b5..95fd5abe68 100644
--- a/src/metaschema/oscal_ssp_metaschema.xml
+++ b/src/metaschema/oscal_ssp_metaschema.xml
@@ -1020,6 +1020,10 @@
       <field ref="remarks" in-xml="WITH_WRAPPER"/>
     </model>
     <constraint>
+      <allowed-values target="link/@rel" allow-other="yes">
+        <!-- TODO: More work needs to be done around link enforcement constraints and requires Metaschema work on recurse-depth-first() recursive index searching. -->
+        <enum value="imported-from">The hyperlink identifies a URI pointing to the <code>component</code> in a <code>component-definition</code> that originally described the <code>component</code> this component was based on.</enum>
+      </allowed-values>
       <allowed-values target=".//responsible-role/@role-id" allow-other="yes">
             &allowed-values-responsible-roles-operations;
             &allowed-values-responsible-roles-component-production;
diff --git a/xml/README.md b/xml/README.md
index 5a6f6b7b42..60598e7a77 100644
--- a/xml/README.md
+++ b/xml/README.md
@@ -36,7 +36,7 @@ XML Schema based on the [XML Schema Definition Language (XSD) 1.1](https://www.w
 
 ## Validating OSCAL XML Content
 
-The OSCAL project uses [xmllint](http://xmlsoft.org/xmllint.html) to perform automated validation of all XML-based OSCAL [content](../content) provided in this repository. *xmllint* is an open source tool that can be [downloaded](http://xmlsoft.org/downloads.html), installed, and run on OSX, Linux, and Windows environments.
+The OSCAL project uses [xmllint](https://linux.die.net/man/1/xmllint/) to perform automated validation of all XML-based OSCAL [content](../content) provided in this repository. *xmllint* is an open source tool that can be downloaded, installed, and run on OSX, Linux, and Windows environments with your preferred package manager.
 
 The following example uses **xmllint** to perform validation of an OSCAL catalog XML file.
 
@@ -44,7 +44,7 @@ The following example uses **xmllint** to perform validation of an OSCAL catalog
 xmllint --noout --schema "oscal_catalog_schema.xsd" "catalog.xml"
 ```
 
-The [online documentation](http://xmlsoft.org/xmllint.html) for *xmllint* provides more information on the commandline arguments.
+The [online documentation](https://linux.die.net/man/1/xmllint/) for *xmllint* provides more information on the commandline arguments.
 
 # OSCAL JSON to XML Converters