xml - DTD Element Assistance -


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hey guys i've got xml dtd code external when try , validate it, seem error. code have below:

<!doctype catalog [      <!element catalog (book)+>     <!element book (title, authors, year_published, isbn, number_of_pages, price) >     <!element title (#pcdata)>     <!element authors (author)>     <!element author (first_name, last_name, gender)>         <!element first_name (#pcdata)>         <!element last_name (#pcdata)>         <!element gender (#pcdata)>     <!element year_pusblished (#pcdata)>     <!element isbn (#pcdata)>     <!element number_of_pages (#pcdata)>     <!element price (discount)>         <!attlist price discount (yes|no) "no">]>

i know correct when validate error message comes up:

"markup declarations contained in or pointed document type declaration must well-formed. line 3 column 4"

i've checked can't seem working. guys able help?

if write file .xml have no error generated, if have .dtd file must clear element! correct file test.xml:

<?xml version="1.0" encoding="utf-8"?> <!doctype catalog [  <!element catalog (book)+> <!element book (title, authors, year_published, isbn, number_of_pages, price) > <!element title (#pcdata)> <!element authors (author)> <!element author (first_name, last_name, gender)> <!element first_name (#pcdata)> <!element last_name (#pcdata)> <!element gender (#pcdata)> <!element year_pusblished (#pcdata)> <!element isbn (#pcdata)> <!element number_of_pages (#pcdata)> <!element price (discount)> <!attlist price discount (yes|no) "no">]> <catalog>     <book>         <title></title>         <authors>             <author>                 <first_name></first_name>                 <last_name></last_name>                 <gender></gender>             </author>         </authors>         <year_published></year_published>         <isbn></isbn>         <number_of_pages></number_of_pages>         <price>             <discount></discount>         </price>     </book> </catalog>

correct file test.dtd (linked xml file declaration same test.xml ):

<?xml version="1.0" encoding="utf-8"?> <!element catalog (book)+> <!element book (title, authors, year_published, isbn, number_of_pages, price) > <!element title (#pcdata)> <!element authors (author)> <!element author (first_name, last_name, gender)> <!element first_name (#pcdata)> <!element last_name (#pcdata)> <!element gender (#pcdata)> <!element year_pusblished (#pcdata)> <!element isbn (#pcdata)> <!element number_of_pages (#pcdata)> <!element price (discount)> <!attlist price discount (yes|no) "no">

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