diff --git a/doc/src/technical/guia-desenvolvemento/guia-integracion-terceiros.rst b/doc/src/technical/guia-desenvolvemento/guia-integracion-terceiros.rst
index 40c8da650..febf382ff 100644
--- a/doc/src/technical/guia-desenvolvemento/guia-integracion-terceiros.rst
+++ b/doc/src/technical/guia-desenvolvemento/guia-integracion-terceiros.rst
@@ -372,14 +372,14 @@ Exemplo de ficheiro de importación
          <material code="TOR15" description="Tornillos Serie-15" price="123.12" unit-type="10" disabled="false"/>
        </material-list>
        <children>
-         <material-category code=20" name="Tornillos Planos" >
+         <material-category code="20" name="Tornillos Planos" >
             <material-list>
               <material code="TORP12" description="Tornillos Serie-12" price="123.12" unit-type="10" disabled="false"/>
               <material code="TORP13" description="Tornillos Serie-13" price="123.12" unit-type="10" disabled="false"/>
               <material code="TORP15" description="Tornillos Serie-15" price="123.12" unit-type="10" disabled="false"/>
             </material-list>
          </material-category>
-         <material-category code=23" name="Tornillos Estrella" >
+         <material-category code="23" name="Tornillos Estrella" >
             <material-list>
               <material code="TORE12" description="Tornillos Serie-12" price="123.12" unit-type="10" disabled="false"/>
               <material code="TORE13" description="Tornillos Serie-13" price="123.12" unit-type="10" disabled="false"/>
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialCategoryDTO.java b/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialCategoryDTO.java
index 91683ef1a..0b64ede98 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialCategoryDTO.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialCategoryDTO.java
@@ -43,7 +43,7 @@ public class MaterialCategoryDTO extends IntegrationEntityDTO {
     @XmlAttribute
     public String parent;
 
-    @XmlElement
+    @XmlElement(name = "children")
     public MaterialCategoryListDTO subcategories;
 
     @XmlElementWrapper(name = "material-list")
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialDTO.java b/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialDTO.java
index 093c87fe2..1d9c1a4b2 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialDTO.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/ws/materials/api/MaterialDTO.java
@@ -37,10 +37,10 @@ public class MaterialDTO extends IntegrationEntityDTO {
     @XmlAttribute
     public String description;
 
-    @XmlAttribute
+    @XmlAttribute(name = "price")
     public BigDecimal defaultPrice;
 
-    @XmlAttribute
+    @XmlAttribute(name = "unit-type")
     public String unitType;
 
     @XmlAttribute
diff --git a/scripts/rest-clients/material-categories-sample.xml b/scripts/rest-clients/material-categories-sample.xml
index d19af03f9..74582a375 100644
--- a/scripts/rest-clients/material-categories-sample.xml
+++ b/scripts/rest-clients/material-categories-sample.xml
@@ -1,42 +1,26 @@
 <?xml version="1.0" encoding="utf-8" standalone="yes"?>
 <material-category-list xmlns="http://rest.ws.navalplanner.org">
-  <material-category name="Imported materials without category"
-  code="000-000" />
-  <material-category name="ship hull" code="000-001">
-    <material-list>
-      <material disabled="false" unitType="000-002"
-      defaultPrice="6.00" description="fiberglass"
-      code="000-002" />
-      <material disabled="false" defaultPrice="9.50"
-      description="steel" code="000-003" />
-      <material disabled="false" unitType="000-006"
-      defaultPrice="8.00" description="aluminum" code="000-001" />
-    </material-list>
-  </material-category>
-  <material-category name="paint"
-  code="000-003">
-    <subcategories>
-      <material-category parent="000-003"
-      name="Antifouling"
-      code="000-003-001">
-        <material-list>
-          <material disabled="false" defaultPrice="7.50"
-          description="autopulimentante de alto rendimiento"
-          code="000-004" />
-          <material disabled="false" defaultPrice="5.60"
-          description="High Performance autopulimentante"
-          code="000-005" />
-        </material-list>
-      </material-category>
-      <material-category parent="000-003"
-      name="GelCoat" code="000-003-002">
-        <material-list>
-          <material disabled="false" defaultPrice="0.00"
-          description="polyester finish" code="000-006" />
-          <material disabled="false" defaultPrice="0.00"
-          description="polyester finish with gun" code="000-007" />
-        </material-list>
-      </material-category>
-    </subcategories>
+  <material-category code="10" name="Screws" >
+     <material-list>
+       <material code="SCREW12" description="Screws Serie-12" price="123.12" unit-type="10" disabled="false"/>
+       <material code="SCREW13" description="Screws Serie-13" price="123.12" unit-type="10" disabled="false"/>
+       <material code="SCREW15" description="Screws Serie-15" price="123.12" unit-type="10" disabled="false"/>
+     </material-list>
+     <children>
+       <material-category code="20" name="Slotted Screws" >
+          <material-list>
+            <material code="SCREWS12" description="Screws Serie-12" price="123.12" unit-type="10" disabled="false"/>
+            <material code="SCREWS13" description="Screws Serie-13" price="123.12" unit-type="10" disabled="false"/>
+            <material code="SCREWS15" description="Screws Serie-15" price="123.12" unit-type="10" disabled="false"/>
+          </material-list>
+       </material-category>
+       <material-category code="23" name="Phillips Screws" >
+          <material-list>
+            <material code="SCREWP12" description="Screws Serie-12" price="123.12" unit-type="10" disabled="false"/>
+            <material code="SCREWP13" description="Screws Serie-13" price="123.12" unit-type="10" disabled="false"/>
+            <material code="SCREWP15" description="Screws Serie-15" price="123.12" unit-type="10" disabled="true"/>
+          </material-list>
+       </material-category>
+     </children>
   </material-category>
 </material-category-list>
diff --git a/scripts/rest-clients/unit-types-sample.xml b/scripts/rest-clients/unit-types-sample.xml
index 30c4b93a9..e483b20c2 100644
--- a/scripts/rest-clients/unit-types-sample.xml
+++ b/scripts/rest-clients/unit-types-sample.xml
@@ -9,6 +9,8 @@
   <unit-type measure="m3" code="000-007" />
   <unit-type measure="tn" code="000-008" />
 
+  <unit-type measure="box" code="10" />
+
 <!-- code repeated -->
   <unit-type measure="m1" code="000-001" />
 <!-- without code  -->