parser.bnf

<root_layout> ::= <linear_layout> | <relative_layout>
 
<must_atributes> ::= android:layout_width="(<string> | <pos_int>)"
     android:layout_height="(<string> | <pos_int>)"
 
<linear_layout> ::= <LinearLayout <must_atributes>
[android:id="<string>"]
[android:orientation="<string>"]>
       (<elements>|<linear_layout>)+
 </LinearLayout>
 
<relative_layout> ::= <RelativeLayout <must_atributes>
 [android:id="<string>"]>
                                            	     	 {<elements>|<relative_layout>}
            </RelativeLayout>
 
<elements> ::= <text_view> | <image_view> | <button> | <radio_group> | <progress_bar>
 
<text_view> ::= <TextView <must_atributes>
			         android:text="<string>"
         [android:id="<string>"]
         [android:textColor="<string>"]/>

<image_view> ::=   <ImageView <must_atributes>
			                   android:src="<string>"
				     [android:id="<string>"]
				     [android:padding="<pos_int>"]/>

<button> ::=  <Button <must_atributes>
		              android:text="<string>"
			 [android:id="<string>"]
		             [android:padding="<pos_int>"]/>

<radio_group> ::=  <RadioGroup <must_atributes>
				      [android:id="<string>"]
  				      [android:checkedButton="<string>"]>
			                   <radio_button>
<RadioGroup/>

 <radio_button> ::= <RadioButton <must_atributes>
		                                    android:text="<string>"
			                       [android:id="<string>"]/>

<progress_bar> ::= <ProgressBar <must_atributes>
		 	 	      [android:id="<string>"]
			                   [android:max="<pos_int>"]
				      [android:progress="<pos_int>"]/>
<string> ::= {<letter> | <number_digit>}
<text> ::= {<letter> | <number_digit> | <symbol>}


<letter> ::= a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | w | x | y | z | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
<number_digit> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
<symbol> ::= ! | # | $ | % | ... | & | ( | ) | * | ... | /

<integer> ::= <number_digit>+

<comment> ::= <!-- <text> -->