diff --git a/docs/developers/rfcs/rfc6352.md b/docs/developers/rfcs/rfc6352.md
new file mode 100644
index 0000000..f2684d2
--- /dev/null
+++ b/docs/developers/rfcs/rfc6352.md
@@ -0,0 +1,175 @@
+# RFC 6352 (CardDAV)
+
+## ☑ 1. Introduction and Overview
+
+## ☑ 2. Conventions
+
+## ☐ 3. Requirements Overview
+
+## ☑ 4. Address Book Data Model
+
+### ☑ 4.1 Address Book Server
+
+## ☐ 5. Address Book Resources
+
+### ☐ 5.1 Address Object Resources
+
+- vCard objects MUST have a unique UID
+  - Right now the uniqueness is not enforced in store_sqlite :(
+
+#### ☐ 5.1.1 Data Type Conversion
+
+Again, the client can use content negotiation to
+   request that data be returned in a specific media type by specifying
+   appropriate attributes on the CARDDAV:address-data XML element used
+   in the request body (see Section 10.4).
+
+- [ ] Accept address-data attributes
+
+#### ☐ 5.1.1.1 Additional Precondition for GET
+
+- Make sure that Accept header matches content type
+
+### ☐ 5.2 Address Book Collections
+
+## ☑ 6. Address Book Feature
+
+### ☑ 6.1 Address Book Support
+
+#### ☑ 6.1.1 Example: Using OPTIONS for the Discovery of Support for CardDAV
+
+### ☐ 6.2 Address Book Properties
+
+#### ☑ 6.2.1 CARDDAV:addressbook-description Property
+
+#### ☑ 6.2.2 CARDDAV:supported-address-data Property
+
+#### ☑ 6.2.3 CARDDAV:max-resource-size Property
+
+### ☐ 6.3 Creating Resources
+
+#### ☑ 6.3.1 Extended MKCOL Method
+
+##### ☑ 6.3.1.1 Example - Successful MKCOL Request
+
+#### ☐ 6.3.2 Creating Address Object Resources
+
+- [x] If-None-Match support
+
+##### ☐ 6.3.2.1 Additional Preconditions for PUT, COPY, and MOVE
+
+- [ ] Make sure UID is unique
+
+##### ☑ 6.3.2.2 Non-Standard vCard Properties and Parameters
+
+##### ☑ 6.3.2.3 Address Object Resource Entity Tag
+
+## ☑ 7. Address Book Access Control
+
+### ☑ 7.1 Additional Principal Properties
+
+#### ☑ 7.1.1 CARDDAV:addressbook-home-set Property
+
+#### ☑ 7.1.2 CARDDAV:principal-address Property
+
+## ☐ 8. Address Book Reports
+
+### ☐ 8.1 REPORT Method
+
+- [ ] DAV:expand-property REPORT
+
+### ☑ 8.2 Ordinary Collections
+
+### ☑ 8.3 Searching Text: Collations
+
+#### ☑ 8.3.1 CARDDAV:supported-collation-set Property
+
+### ☐ 8.4 Partial Retrieval (Optional)
+
+### ☑ 8.5 Non-Standard Properties and Parameters
+
+### ☑ 8.6 CARDDAV:addressbook-query Report
+
+#### ☐ 8.6.1 Limiting Results
+
+#### ☑ 8.6.2 Truncation of Results (does not apply)
+
+#### ☐ 8.6.3 Example: Partial Retrieval of vCards Matching NICKNAME
+
+#### ☐ 8.6.4 Example: Partial Retrieval of vCards Matching a Full Name or Email Address
+
+#### ☐ 8.6.5 Example: Truncated Results
+
+### ☐ 8.7 CARDDAV:addressbook-multiget Report
+
+#### ☑ 8.7.1 Example: CARDDAV:addressbook-multiget Report
+
+#### ☐ 8.7.2 Example: CARDDAV:addressbook-multiget Report
+
+- [ ] Check for content-type of requested data
+
+    ```
+    <C:address-data content-type='text/vcard' version='4.0'/>
+    ```
+
+## ☑ 9. Client Guidelines
+
+### ☑ 9.1 Restrict the Properties Returned
+
+### ☑ 9.2 Avoiding Lost Updates
+
+### ☑ 9.3 Client Configuration
+
+### ☐ 9.4 Finding Other Users' Address Books
+
+- [ ] Implement DAV:principal-property-search REPORT [RFC3744]
+
+## ☑ 10. XML Element Definitions
+
+### ☑ 10.1 CARDDAV:addressbook XML Element
+
+### ☑ 10.2 CARDDAV:supported-collation XML Element
+
+### ☑ 10.3 CARDDAV:addressbook-query XML Element
+
+### ☑ 10.4 CARDDAV:address-data XML Element
+
+- [ ] Support content-type and version
+
+#### ☐ 10.4.1 CARDDAV:allprop XML Element (does not apply, is for vCard props)
+
+#### ☐ 10.4.2 CARDDAV:prop XML Element (does not apply, is for vCard props)
+
+### ☑ 10.5 CARDDAV:filter XML Element
+
+#### ☑ 10.5.1 CARDDAV:prop-filter XML Element
+
+#### ☑ 10.5.2 CARDDAV:param-filter XML Element
+
+#### ☑ 10.5.3 CARDDAV:is-not-defined XML Element
+
+#### ☑ 10.5.4 CARDDAV:text-match XML Element
+
+### ☑ 10.6 CARDDAV:limit XML Element
+
+#### ☑ 10.6.1 CARDDAV:nresults XML Element
+
+### ☑ 10.7 CARDDAV:addressbook-multiget XML Element
+
+## ☑ 11. Service Discovery via SRV Records
+
+## ☑ 12. Internationalization Considerations
+
+## ☑ 13. Security Considerations
+
+## ☑ 14. IANA Consideration
+
+### ☑ 14.1 Namespace Registration
+
+## ☑ 15. Acknowledgments
+
+## ☑ 16. References
+
+### ☑ 16.1 Normative References
+
+### ☑ 16.2 Informative References
diff --git a/mkdocs.yml b/mkdocs.yml
index a5d6f6d..3733854 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -75,7 +75,9 @@ nav:
   - OpenID Connect: setup/oidc.md
   - Developers:
       - developers/index.md
-      - Relevant RFCs: developers/rfcs.md
+      - Relevant RFCs:
+          - developers/rfcs.md
+          - RFC 6352: developers/rfcs/rfc6352.md
       - Frontend: developers/frontend.md
       - Debugging: developers/debugging.md
   - Cargo docs: /rustical/_crate/rustical/