diff --git a/SUMMARY.md b/SUMMARY.md
index 3b25a51..382e5d4 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -36,6 +36,8 @@
 * [Deep Dives](deep-dives/README.md)
   * [GitHub Repo](https://github.com/vcon-dev/vcon)
   * [vCon IETF Working Group](https://datatracker.ietf.org/group/vcon/about/)
+  * [Content Integrity](deep-dives/content-integrity.md)
+  * [Privacy Management](deep-dives/privacy-first-conversation-management.md)
   * [vCon Lifecycle Management using SCITT](deep-dives/vcon-lifecycle-management-using-scitt.md)
   * [vCon Consent Attachment](https://claude.ai/public/artifacts/f62b38a6-8ab3-45c9-a4b2-ff9b5c756799)
   * [Privacy-First Conversation Management](deep-dives/privacy-first-conversation-management.md)
diff --git a/deep-dives/content-integrity.md b/deep-dives/content-integrity.md
new file mode 100644
index 0000000..96ee0cd
--- /dev/null
+++ b/deep-dives/content-integrity.md
@@ -0,0 +1,26 @@
+# Content Integrity in vCon 0.3.0
+
+## Overview
+Content integrity is a core feature of vCon 0.3.0, providing cryptographic verification of conversation content.
+
+## Implementation Details
+
+### Content Hashing
+```python
+# Calculate hash for dialog content
+dialog.calculate_content_hash()
+
+# Verify content integrity
+is_valid = dialog.verify_content_hash()
+```
+
+### Automatic Hash Calculation
+Content hashes are automatically calculated when:
+- Adding external files
+- Modifying dialog content
+- Updating party information
+
+## Best Practices
+- Always verify content hashes when loading external content
+- Enable automatic hash calculation
+- Implement hash verification in your workflow
\ No newline at end of file
diff --git a/vcon-library/cheat-sheet.md b/vcon-library/cheat-sheet.md
index 7c5b91f..b87380d 100644
--- a/vcon-library/cheat-sheet.md
+++ b/vcon-library/cheat-sheet.md
@@ -10,6 +10,7 @@ icon: scroll
 from vcon import Vcon
 from vcon.party import Party
 from vcon.dialog import Dialog
+from vcon.civic_address import CivicAddress
 ```
 
 #### Creating vCons
@@ -40,20 +41,37 @@ dict_data = vcon.to_dict()
 #### Creating & Adding Parties
 
 ```python
-# Create party
+# Create party with new fields
 party = Party(
     tel="+1234567890",
     name="John Doe",
     mailto="john@example.com",
     role="customer",
+    sip="sip:john@example.com",
+    did="did:example:123",
+    jCard="...",  # RFC 7095 format
+    timezone="America/New_York",
     meta={"custom": "data"}
 )
 
-# Add to vCon
-vcon.add_party(party)
+# Add civic address
+address = CivicAddress(
+    country="US",
+    a1="California",  # State
+    a2="San Francisco",  # County
+    a3="San Francisco",  # City
+    pc="94105",  # Postal code
+    sts="Market",  # Street
+    hno="123",  # House number
+    flr="4"  # Floor
+)
+party.civic_address = address
 
-# Find party
-index = vcon.find_party_index("name", "John Doe")
+# Party history events
+party.add_event("join", "2025-08-15T10:00:00Z")
+party.add_event("hold", "2025-08-15T10:05:00Z")
+party.add_event("unhold", "2025-08-15T10:07:00Z")
+events = party.get_events()
 ```
 
 ### Dialog
@@ -61,8 +79,19 @@ index = vcon.find_party_index("name", "John Doe")
 #### Supported MIME Types
 
 * Text: `text/plain`
-* Audio: `audio/x-wav`, `audio/wav`, `audio/mpeg`, `audio/mp3`, `audio/ogg`, `audio/webm`
-* Video: `video/x-mp4`, `video/ogg`
+* Audio: 
+    * `audio/x-wav`, `audio/wav`
+    * `audio/mpeg`, `audio/mp3`, `audio/x-mp3`
+    * `audio/ogg`, `audio/webm`, `audio/x-mp4`
+    * `audio/aac`
+* Video: 
+    * `video/mp4`, `video/webm`
+    * `video/x-avi`, `video/x-matroska`
+    * `video/quicktime`, `video/x-flv`
+    * `video/3gpp`
+* Images: `image/jpeg`, `image/tiff`
+* Documents: `application/pdf`
+
 
 #### Adding Dialog
 
@@ -197,28 +226,66 @@ uuid = Vcon.uuid8_time(custom_bits)
 ### Properties Reference
 
 #### Vcon Properties
-
 * `uuid`: Unique identifier
-* `vcon`: Version number
+* `vcon`: Version number (0.3.0)
+* `extensions`: Extension capabilities
+* `must_support`: Required extensions
 * `created_at`: Creation timestamp
 * `updated_at`: Last update timestamp
-* `parties`: List of participants
-* `dialog`: List of dialog entries
-* `attachments`: List of attachments
-* `analysis`: List of analysis entries
-* `redacted`: Redaction information
-* `group`: Group information
-* `meta`: Metadata
+// ...existing code...
 
 #### Party Properties
-
 * `tel`: Telephone number
-* `stir`: STIR verification
+* `sip`: SIP URI
+* `did`: Decentralized Identifier
+* `jCard`: vCard format contact
+* `timezone`: Timezone
 * `mailto`: Email address
 * `name`: Party name
 * `validation`: Validation status
-* `gmlpos`: Geographic position
-* `civicaddress`: Civic address
+* `civicaddress`: GEOPRIV compliant address
 * `uuid`: Unique identifier
 * `role`: Party role
 * `meta`: Additional metadata
+
+#### Dialog Properties
+* `type`: Dialog type
+* `start`: Start timestamp
+* `parties`: Participant indices
+* `session_id`: Session tracking
+* `content_hash`: Content integrity
+* `application`: Application ID
+* `message_id`: Message tracking
+* `disposition`: Incomplete dialog status
+* `transfer_target`: Transfer destination
+* `target_dialog`: Target dialog reference
+
+### Extensions & Features
+
+```python
+# Add extension capability
+vcon.add_extension("com.example.feature")
+vcon.remove_extension("com.example.feature")
+extensions = vcon.get_extensions()
+
+# Required extensions
+vcon.add_must_support("com.example.required")
+vcon.remove_must_support("com.example.required")
+must_support = vcon.get_must_support()
+```
+
+### Dialog Disposition Values
+
+```python
+# Create dialog with disposition
+dialog = Dialog(
+    type="incomplete",
+    disposition="no-answer"  # Valid values:
+                            # - no-answer
+                            # - congestion
+                            # - failed
+                            # - busy
+                            # - hung-up
+                            # - voicemail-no-message
+)
+```
\ No newline at end of file
diff --git a/vcon-library/library-api.md b/vcon-library/library-api.md
index f79d2f8..70e62be 100644
--- a/vcon-library/library-api.md
+++ b/vcon-library/library-api.md
@@ -50,6 +50,14 @@ Note: If no dictionary is provided, an empty vCon object will be created. Use `b
 * `add_dialog(dialog: Dialog) -> None`: Add a dialog to the vCon.
 * `sign(private_key: Union[rsa.RSAPrivateKey, bytes]) -> None`: Sign the vCon using JWS.
 * `verify(public_key: Union[rsa.RSAPublicKey, bytes]) -> bool`: Verify the JWS signature of the vCon.
+* `add_extension(extension_name: str) -> None`: Adds an extension capability to the vCon.
+* `remove_extension(extension_name: str) -> None`: Removes an extension capability.
+* `get_extensions() -> List[str]`: Returns list of declared extensions.
+* `add_must_support(feature: str) -> None`: Adds a required extension feature.
+* `remove_must_support(feature: str) -> None`: Removes a required extension feature.
+* `get_must_support() -> List[str]`: Returns list of required extensions.
+* `calculate_content_hash() -> str`: Calculates SHA-256 hash for content integrity.
+* `verify_content_hash() -> bool`: Verifies content integrity using stored hash.
 
 #### Properties
 
@@ -152,6 +160,9 @@ Note: Optional parameters that are set to None will not create attributes on the
 * `is_email() -> bool`: Checks if the dialog is an email dialog.
 * `is_external_data_changed() -> bool`: Checks if the external data dialog's contents have changed.
 * `to_inline_data() -> None`: Converts the dialog from an external data dialog to an inline data dialog.
+* `calculate_content_hash() -> str`: Calculates SHA-256 hash for dialog content.
+* `verify_content_hash() -> bool`: Verifies dialog content integrity.
+* `is_content_changed() -> bool`: Checks if content has been modified since last hash.
 
 #### Example Usage
 
@@ -208,6 +219,9 @@ Note: Optional parameters that are set to None will not create attributes on the
 #### Methods
 
 * `to_dict() -> dict`: Returns a dictionary representation of the Party object.
+* `add_event(event: str, timestamp: str) -> None`: Adds a party history event (join, drop, hold, unhold, mute, unmute).
+* `get_events() -> List[dict]`: Returns list of party history events.
+* `validate_events() -> Tuple[bool, List[str]]`: Validates party history events.
 
 #### Example Usage
 
diff --git a/vcon-library/quickstart.md b/vcon-library/quickstart.md
index ea7496d..6f6e197 100644
--- a/vcon-library/quickstart.md
+++ b/vcon-library/quickstart.md
@@ -24,6 +24,7 @@ from vcon import Vcon
 from vcon.party import Party
 from vcon.dialog import Dialog
 from vcon.party import PartyHistory
+from vcon.civic_address import CivicAddress
 ```
 
 ### Step 2: Create a New vCon Object
@@ -209,6 +210,45 @@ if __name__ == "__main__":
     main()
 ```
 
+### Extensions and Required Features
+
+```python
+# Declare extension capabilities
+vcon.add_extension("com.example.feature")
+vcon.add_must_support("com.example.required")
+
+# Check extension support
+extensions = vcon.get_extensions()
+required = vcon.get_must_support()
+```
+
+### Enhanced Party Information
+
+```python
+# Create party with new contact methods
+party = Party(
+    tel="+1234567890",
+    sip="sip:user@example.com",
+    did="did:example:123",
+    jCard="...",  # RFC 7095 format
+    timezone="America/New_York"
+)
+
+# Add GEOPRIV-compliant address
+address = CivicAddress(
+    country="US",
+    a1="California",  # State
+    a2="San Francisco",  # County
+    sts="Market",  # Street
+    hno="123"  # House number
+)
+party.civic_address = address
+
+# Track party events
+party.add_event("join", "2025-08-15T10:00:00Z")
+party.add_event("mute", "2025-08-15T10:05:00Z")
+```
+
 ##
 
 ### Contributing