Index: Cargo.toml
==================================================================
--- Cargo.toml
+++ Cargo.toml
@@ -1,8 +1,8 @@
 [package]
 name = "strval"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2024"
 license = "0BSD"
 # https://crates.io/category_slugs
 categories = ["text-processing"]
 keywords = ["parsing", "string", "rusqlite"]

Index: src/binu64count.rs
==================================================================
--- src/binu64count.rs
+++ src/binu64count.rs
@@ -53,10 +53,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for BinU64Count<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/binu64size.rs
==================================================================
--- src/binu64size.rs
+++ src/binu64size.rs
@@ -53,10 +53,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for BinU64Size<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/binusizecount.rs
==================================================================
--- src/binusizecount.rs
+++ src/binusizecount.rs
@@ -53,10 +53,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for BinUsizeCount<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/binusizesize.rs
==================================================================
--- src/binusizesize.rs
+++ src/binusizesize.rs
@@ -53,10 +53,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for BinUsizeSize<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/boolean.rs
==================================================================
--- src/boolean.rs
+++ src/boolean.rs
@@ -47,10 +47,14 @@
       Some(String::from("true"))
     } else {
       Some(String::from("false"))
     }
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    (self.sval.clone(), None)
+  }
 }
 
 impl AsRef<str> for Bool {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/decu64count.rs
==================================================================
--- src/decu64count.rs
+++ src/decu64count.rs
@@ -53,10 +53,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for DecU64Count<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/decu64size.rs
==================================================================
--- src/decu64size.rs
+++ src/decu64size.rs
@@ -52,10 +52,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for DecU64Size<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/decusizecount.rs
==================================================================
--- src/decusizecount.rs
+++ src/decusizecount.rs
@@ -53,10 +53,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for DecUsizeCount<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/decusizesize.rs
==================================================================
--- src/decusizesize.rs
+++ src/decusizesize.rs
@@ -52,10 +52,16 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(self.val.to_string())
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    let eval = self.val.to_string();
+    let eval = (self.sval != eval).then_some(eval);
+    (self.sval.clone(), eval)
+  }
 }
 
 impl<C> AsRef<str> for DecUsizeSize<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/dur.rs
==================================================================
--- src/dur.rs
+++ src/dur.rs
@@ -60,10 +60,14 @@
   }
 
   fn val_str(&self) -> Option<String> {
     None
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    (self.sval.clone(), None)
+  }
 }
 
 impl<C> AsRef<str> for Dur<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/lib.rs
==================================================================
--- src/lib.rs
+++ src/lib.rs
@@ -75,10 +75,17 @@
 
   fn get(&self) -> Self::Type;
 
   /// Return a string representation of the value.
   fn val_str(&self) -> Option<String>;
+
+  /// Return a string representation of the configuration parameter's value,
+  /// with an optional "evaluated" string.
+  ///
+  /// If the "evaluated" string is identical to the regular string
+  /// representation, the second field will be `None`.
+  fn get_str_vals(&self) -> (String, Option<String>);
 }
 
 /// Define a default (string) value and provide a value validator.
 pub trait Controller {
   type Type;

Index: src/percent.rs
==================================================================
--- src/percent.rs
+++ src/percent.rs
@@ -43,10 +43,14 @@
   }
 
   fn val_str(&self) -> Option<String> {
     Some(format!("{}%", self.val * 100.0))
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    (self.sval.clone(), None)
+  }
 }
 
 impl AsRef<str> for Percent {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/relabslim.rs
==================================================================
--- src/relabslim.rs
+++ src/relabslim.rs
@@ -91,10 +91,14 @@
     match self.val {
       Lim::Rel(f) => Some(f.to_string()),
       Lim::Abs(v) => Some(v.to_string())
     }
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    (self.sval.clone(), None)
+  }
 }
 
 impl<C> AsRef<str> for RelAbsLim<C> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/select.rs
==================================================================
--- src/select.rs
+++ src/select.rs
@@ -45,10 +45,14 @@
   }
 
   fn val_str(&self) -> Option<String> {
     None
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    (self.sval.clone(), None)
+  }
 }
 
 impl<E> AsRef<str> for Select<E> {
   fn as_ref(&self) -> &str {
     &self.sval

Index: src/str.rs
==================================================================
--- src/str.rs
+++ src/str.rs
@@ -52,10 +52,14 @@
   }
 
   fn val_str(&self) -> Option<String> {
     None
   }
+
+  fn get_str_vals(&self) -> (String, Option<String>) {
+    (self.val.clone(), None)
+  }
 }
 
 impl<C> AsRef<str> for Str<C> {
   fn as_ref(&self) -> &str {
     &self.val

Index: www/changelog.md
==================================================================
--- www/changelog.md
+++ www/changelog.md
@@ -2,23 +2,33 @@
 
 ⚠️  indicates a breaking change.
 
 ## [Unreleased]
 
-[Details](/vdiff?from=strval-0.1.0&to=trunk)
+[Details](/vdiff?from=strval-0.2.0&to=trunk)
 
 ### Added
 
 ### Changed
 
 ### Removed
 
 ---
+
+## [0.2.0] - 2025-07-09
+
+[Details](/vdiff?from=strval-0.1.1&to=strval-0.2.0)
+
+### Added
+
+- ⚠️ Add trait method `StrVal::get_str_vals()`.
+
+---
 
 ## [0.1.1] - 2025-07-09
 
-[Details](/vdiff?from=strval-0.1.0&to=trunk)
+[Details](/vdiff?from=strval-0.1.0&to=strval-0.1.1)
 
 ### Added
 
 - `BinUsizeCount`, `BinUsizeSize`, `DecUsizeCount`, `DecUsizeSize`