| atLeast | 
                                 union of(xs:double, xs:decimal, restriction of xs:token) | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             gives a minimum estimated value for the approximate
measurement.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | atMost | 
                                 union of(xs:double, xs:decimal, restriction of xs:token) | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             gives a maximum estimated value for the approximate
measurement.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | confidence | 
                                 xs:double | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             specifies the degree of statistical confidence (between zero and one) that
a value falls within the range specified by min and max, or the proportion of observed
values that fall within that range.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | extent | 
                                 xs:string | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             indicates the size of the object concerned using a project-specific
vocabulary combining quantity and units in a single string of words.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | max | 
                                 union of(xs:double, xs:decimal, restriction of xs:token) | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             where the measurement summarizes more than one observation or a range,
supplies the maximum value observed.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | min | 
                                 union of(xs:double, xs:decimal, restriction of xs:token) | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             where the measurement summarizes more than one observation or a range,
supplies the minimum value observed.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | precision | 
                                 restriction of xs:token | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             characterizes the precision of the values specified by the other
attributes.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | quantity | 
                                 union of(xs:double, xs:decimal, restriction of xs:token) | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             specifies the length in the units specified  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | scope | 
                                 restriction of xs:token | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             where the measurement summarizes more than one observation, specifies the
applicability of this measurement. Sample values include: 1] all; 2] most; 3]
range  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | unit | 
                                 union of(restriction of xs:token, restriction of xs:token, restriction of xs:token, restriction of xs:token, restriction of xs:token, restriction of xs:token) | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             names the unit used for the measurement Suggested values include: 1]
cm(centimetres) ; 2] mm(millimetres) ; 3] in(inches) ; 4] lines; 5] chars(characters)  | 
                                           
                                        
                                     
                                  |