diff --git a/Cargo.toml b/Cargo.toml
index 041ba407..2654e423 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ exclude = [
     "**/ion-tests/iontestdata/**",
     "*.pdf"
 ]
-version = "1.0.0-rc.9"
+version = "1.0.0-rc.10"
 edition = "2021"
 rust-version = "1.80"
 
diff --git a/src/lazy/any_encoding.rs b/src/lazy/any_encoding.rs
index 4423d64c..8274373f 100644
--- a/src/lazy/any_encoding.rs
+++ b/src/lazy/any_encoding.rs
@@ -280,6 +280,12 @@ pub struct AnyEExpArgGroup<'top> {
     kind: AnyEExpArgGroupKind<'top>,
 }
 
+impl<'a> AnyEExpArgGroup<'a> {
+    pub fn kind(&self) -> AnyEExpArgGroupKind<'a> {
+        self.kind
+    }
+}
+
 #[derive(Copy, Clone, Debug)]
 pub enum AnyEExpArgGroupKind<'top> {
     Text_1_1(TextEExpArgGroup<'top>),
diff --git a/src/lazy/binary/raw/v1_1/e_expression.rs b/src/lazy/binary/raw/v1_1/e_expression.rs
index dc755022..cee88bea 100644
--- a/src/lazy/binary/raw/v1_1/e_expression.rs
+++ b/src/lazy/binary/raw/v1_1/e_expression.rs
@@ -451,6 +451,11 @@ impl<'top> BinaryEExpArgGroup<'top> {
         self.delimited_values = Some(delimited_values);
         self
     }
+
+    pub fn header_span(&self) -> Span<'_> {
+        let header_input = self.input.slice(0, self.header_size as usize);
+        Span::from(header_input)
+    }
 }
 
 impl HasRange for BinaryEExpArgGroup<'_> {
diff --git a/src/lazy/binary/raw/v1_1/immutable_buffer.rs b/src/lazy/binary/raw/v1_1/immutable_buffer.rs
index 5bdc1291..7080f02a 100644
--- a/src/lazy/binary/raw/v1_1/immutable_buffer.rs
+++ b/src/lazy/binary/raw/v1_1/immutable_buffer.rs
@@ -497,7 +497,7 @@ impl<'a> BinaryBuffer<'a> {
     /// Reads the value for a delimited struct field, consuming NOPs if present.
     fn peek_delimited_struct_value(
         &self,
-    ) -> IonResult<(Option<LazyRawBinaryValue_1_1<'a>>, BinaryBuffer<'a>)> {
+    ) -> IonResult<(Option<LazyRawValueExpr<'a, v1_1::Binary>>, BinaryBuffer<'a>)> {
         let opcode = self.expect_opcode()?;
         if opcode.is_nop() {
             let after_nops = self.consume_nop_padding(opcode)?.1;
@@ -507,7 +507,7 @@ impl<'a> BinaryBuffer<'a> {
             }
             Ok((None, after_nops))
         } else {
-            self.read_value(opcode).map(|(v, after)| (Some(v), after))
+            self.read_sequence_value_expr()
         }
     }
 
@@ -547,7 +547,7 @@ impl<'a> BinaryBuffer<'a> {
                 return IonResult::incomplete("found field name but no value", after_name.offset());
             }
 
-            let (value, after_value) = match after_name.peek_delimited_struct_value()? {
+            let (field, after_value) = match after_name.peek_delimited_struct_value()? {
                 (None, after) => {
                     if after.is_empty() {
                         return IonResult::incomplete(
@@ -558,16 +558,15 @@ impl<'a> BinaryBuffer<'a> {
                     buffer = after;
                     continue; // No value for this field, loop to try next field.
                 }
-                (Some(value), after) => (value, after),
+                (Some(RawValueExpr::ValueLiteral(value)), after) => {
+                    (LazyRawFieldExpr::NameValue(field_name, value), after)
+                }
+                (Some(RawValueExpr::EExp(eexp)), after) => {
+                    (LazyRawFieldExpr::NameEExp(field_name, eexp), after)
+                }
             };
 
-            let allocator = self.context().allocator();
-            let value_ref = &*allocator.alloc_with(|| value);
-
-            return Ok((
-                Some(LazyRawFieldExpr::NameValue(field_name, value_ref)),
-                after_value,
-            ));
+            return Ok((Some(field), after_value));
         }
     }
 
@@ -619,7 +618,7 @@ impl<'a> BinaryBuffer<'a> {
         let input = self;
         let header = opcode.to_header().ok_or_else(|| {
             IonError::decoding_error(format!(
-                "found a non-value in value position; buffer=<{:X?}>",
+                "found a non-value in value position; buffer=<{:02X?}>",
                 input.bytes_range(0, 16.min(input.bytes().len()))
             ))
         })?;
diff --git a/src/lib.rs b/src/lib.rs
index b88629ed..3ebdcf9b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -230,6 +230,7 @@ macro_rules! v1_x_reader_writer {
             lazy::expanded::macro_evaluator::ValueExpr,
             lazy::expanded::macro_evaluator::MacroExpr,
             lazy::expanded::macro_evaluator::MacroExprKind,
+            lazy::expanded::macro_evaluator::MacroExprArgsIterator,
         };
     };
 }
@@ -268,6 +269,7 @@ macro_rules! v1_x_tooling_apis {
                 LazyRawAnyStruct, LazyRawStructKind,
                 LazyRawAnyFieldName, LazyRawFieldNameKind,
                 LazyRawAnyEExpression, LazyRawAnyEExpressionKind,
+                AnyEExpArgGroup, AnyEExpArgGroupKind, AnyEExpArgGroupIterator
             },
             lazy::decoder::{
                 LazyRawSequence,