<?xml version="1.0" encoding="UTF-8"?>

<!ELEMENT resources (surface|sprite)+>

<!ELEMENT surface EMPTY>
<!ATTLIST surface name CDATA #REQUIRED file CDATA #REQUIRED>

<!ELEMENT sprite (image, animation?)>
<!ATTLIST sprite name CDATA #REQUIRED>
<!ELEMENT image (grid?)>
<!ATTLIST image file CDATA #REQUIRED>
<!ELEMENT grid EMPTY>
<!ATTLIST grid pos CDATA #REQUIRED size CDATA #REQUIRED array CDATA #REQUIRED>
<!ELEMENT animation EMPTY>
<!ATTLIST animation speed CDATA #IMPLIED loop_mode CDATA #IMPLIED >