diff --git a/src/lib.rs b/src/lib.rs
index 0024fe3..5ae3222 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -32,17 +32,24 @@ const PAIREDADDRESSES: &str = "pairedAddresses";
 
 #[derive(Debug, PartialEq, Eq)]
 pub enum SpecialRoles {
-    DEMIURGE, // Only valid for the first state of a process
-    APOPHIS, // Users in this role have the power to destroy the process
+    Demiurge, // Only valid for the first state of a process
+    Pairing, // Special validation rules for pairing process
+    Apophis, // Users in this role have the power to destroy the process
 }
 
 impl std::fmt::Display for SpecialRoles {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let role_str = match self {
-            SpecialRoles::DEMIURGE => "demiurge",
-            SpecialRoles::APOPHIS => "apophis",
-        };
-        write!(f, "{}", role_str)
+        write!(f, "{}", <&Self as Into<&str>>::into(self))
+    }
+}
+
+impl From<&SpecialRoles> for &str {
+    fn from(value: &SpecialRoles) -> Self {  
+        match value {
+            SpecialRoles::Demiurge => DEMIURGE,
+            SpecialRoles::Pairing => PAIRING,
+            SpecialRoles::Apophis => APOPHIS,
+        }
     }
 }
 
@@ -51,9 +58,37 @@ impl FromStr for SpecialRoles {
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         match s {
-            "demiurge" => Ok(SpecialRoles::DEMIURGE),
-            "apophis" => Ok(SpecialRoles::APOPHIS),
-            _ => Err(format!("Invalid role: {}", s)),
+            DEMIURGE => Ok(SpecialRoles::Demiurge),
+            PAIRING => Ok(SpecialRoles::Pairing),
+            APOPHIS => Ok(SpecialRoles::Apophis),
+            _ => Err(format!("Invalid special role: {}", s)),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum ReservedFields {
+    PairedAddresses,
+    MemberPublicName,
+}
+
+impl From<&ReservedFields> for &str {
+    fn from(value: &ReservedFields) -> Self {
+        match value {
+            ReservedFields::MemberPublicName => MEMBERPUBLICNAME,
+            ReservedFields::PairedAddresses => PAIREDADDRESSES,
+        }
+    }
+}
+
+impl FromStr for ReservedFields {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            MEMBERPUBLICNAME => Ok(ReservedFields::MemberPublicName),
+            PAIREDADDRESSES => Ok(ReservedFields::PairedAddresses),
+            _ => Err(format!("Invalid field name: {}", s)),
         }
     }
 }