There must be at least one material element. | 
                           

| QName | Type | Fixed | Default | Use | Inheritable | Annotation | |
|---|---|---|---|---|---|---|---|
| id | xs:ID | optional | 
                                    
  | 
                              ||||
| name | xs:token | optional | 
                                    
  | 
                              
<xs:element name="material" type="material_type" maxOccurs="unbounded"> <xs:annotation> <xs:documentation>There must be at least one material element.</xs:documentation> </xs:annotation> </xs:element>  | 
                           
| 
                                     < library_materials xmlns = "http://www.collada.org/2008/03/COLLADASchema" >  | 
                              
| 
                                     < material id = "Textured_Bump_E0_MP_MAT" name = "Textured_Bump_E0_MP_MAT" >  | 
                              
| 
                                     < technique_hint platform = "PC-OGL" profile = "GLES2" ref = "Textured_Bump_E0_MP_TECH" />  | 
                              
| 
                                     < float>  | 
                              
| 
                                     25  | 
                              
| 
                                     </ float>  | 
                              
| 
                                     </ setparam>  | 
                              
| 
                                     < float4>  | 
                              
| 
                                     0.368627 0.368421 0.368421 1  | 
                              
| 
                                     </ float4>  | 
                              
| 
                                     </ setparam>  | 
                              
| 
                                     < float4>  | 
                              
| 
                                     0.886275 0.885003 0.885003 1  | 
                              
| 
                                     </ float4>  | 
                              
| 
                                     </ setparam>  |