diff --git a/src/converter.rs b/src/converter.rs
index 0334bb7..4d0c964 100644
--- a/src/converter.rs
+++ b/src/converter.rs
@@ -1,4 +1,8 @@
 //! Convert DOM to register interface defined in [`crate::types`], complementing optional parameters.
+//!
+//! root: [`Module::from_xml_dom`]
+//!
+//! error: [`DomConversionError`]
 
 use std::{num, str};
 
@@ -11,6 +15,7 @@ use crate::types::{
     Value,
 };
 
+/// Possible errors in conversion, with positional information.
 #[derive(Debug, Error, PartialEq)]
 pub enum DomConversionError {
     #[error("attribute {attr} not found in element: {start} - {end}", start = pos.0, end = pos.1)]
@@ -323,6 +328,18 @@ impl Register {
                 .map_err(|e| DomConversionError::parse_prefixed_u32_error(e, "addr", node))?,
             None => 0,
         };
+        let r#type = util::get_type(node)
+            .transpose()?
+            .map_or_else(
+                || {
+                    node.ancestors()
+                        .filter_map(util::get_type)
+                        .next()
+                        .transpose()
+                },
+                |x| Ok(Some(x)),
+            )?
+            .ok_or_else(|| DomConversionError::parameter_completion_error("type", node))?;
         let mask = node
             .attribute("mask")
             .map(|addr| {
@@ -366,10 +383,29 @@ impl Register {
                 node.document().text_pos_at(node.range().end),
             )));
         }
+        if default.is_some() && !children.is_empty() {
+            return Err(DomConversionError::OtherError(format!(
+                "both default and field are used in the same register: {} - {}",
+                node.document().text_pos_at(node.range().start),
+                node.document().text_pos_at(node.range().end),
+            )));
+        }
+        if let (Some(mask), Some(default)) = (mask, default) {
+            if default & !(mask) != 0 {
+                log::warn!(
+                    "default value {} doesn't fit mask {}: {} - {}",
+                    default,
+                    mask,
+                    node.document().text_pos_at(node.range().start),
+                    node.document().text_pos_at(node.range().end)
+                )
+            }
+        }
 
         Ok(Register {
             name,
             addr,
+            r#type,
             mask,
             modf,
             multiple,
diff --git a/src/types.rs b/src/types.rs
index c3bfd3f..4bc205e 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -53,6 +53,8 @@ pub struct Register {
     pub name: String,
     /// Fill this with proper calc.
     pub addr: u32,
+    /// Fill this with proper calc.
+    pub r#type: DataType,
     pub mask: Option<u32>,
     /// Fill this with proper calc.
     pub modf: RwSpecifier,
@@ -111,7 +113,7 @@ pub struct Field {
 pub struct Value {
     pub name: String,
     pub data: u32,
-    pub desc: Option<String>
+    pub desc: Option<String>,
 }
 
 #[derive(Debug, PartialEq)]