根据XML写DTD的问题Down The Stream The Swans All Glide\x05Down the

根据XML写DTD的问题
Down The Stream The Swans All Glide
x05Down the stream the swans all glide;
x05It's quite the cheapest way to ride.
x05Their legs get wet,
x05Their tummies wetter.
x05I think after all
x05The bus is better.
Go North,South,East,and West,Young Man
x05Drake is going west,lads
x05So Tom is going East
x05But tiny Fred
x05just lies in bed.
x05The lazy little beast.
I Must Go Down To The Sea Again
I must go down to the sea again,
to the lonely sea and the sky;
I left my shoes and socks there -
I wonder if they're dry?
以上有两个层次的元素,我就是搞不清楚在DTD中是否要写两面对的声明
然后这是我写的DTD部分：
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