hectorpadin1/xmlcompiler

XML syntax checker using YACC.

Design and implementation of simple XML syntax validator

The parser has been done incrementally, starting with the simplest file: a header and a tag without text, until we were able to validate files with nested tags, comments, etc. In case there is an error, the parser will display a brief but descriptive error message along with the line where it found the problem.

This parser is able to validate xml files taking into account the following conditions:

• Tags do not contain attributes.
• DTD or Schema files are not consider.
• The file must start with an xml header.
• Outside the root tag, there can only be comments and the header at the beginning of the file.
• Within the root tag there may be more nested root tags, which may be followed by more tags, and tag text.
• No line breaks, spaces or tabs are consider for the xml syntax ( is the same as ), but they are consider for naming tags (!=<' 'o>).
• Comments can go on any line except before the header.
• When a label is opened, it must be closed with the same label name.

Several test files, with descriptive names, have been left in order to test the above guidelines.