651 chapter 2 exercise refs: http://www.quackit.com/xml/tutorial/dtd_attribute_types_idref.cfm http://xmlzoo.net/dtd2/?xml=22q.xml https://www.w3schools.com/xml/xml_dtd_attributes.asp 1. file: ... ]> Linguistics From Languages to Information Natural language processing. Cross-listed as ... Dan Jurafsky Beth Levin Frank Zoidberg notes: 1. add xml/dtd to make everything work (replace ...). Prerequisites are optional. 2. make sure your xml document is well-formed with an internal dtd. 3. validate the dtd with xmllint. 4. Copy the command you used for xmllint and its output into a .txt file. 5. Put both your xml file and txt file into the swe2020 folder at gl. 6. Submit two url links: 1) url for your xml file; 2) url for your txt file.