1. detect rules types:

• a [tag] without an [attribute]?
• in [root] tag doesn't have [tag]
• in [root] tag doesn't have [tag] with an [attribute] not equal to [value]
• a [tag] have more than [n]

2. reqs:
   • npm package
   • an array of chain
   • user can define and use their own rules
   • input:
     • an input path to a html file
     • node readable stream
   • output
     • a file (can define stored destination)
     • node writable stream
     • console

Rule - attribute + doc + result + tag - methods + init + check + output

RuleRootExistTag extends Rule

RuleTagExistAttribute extends Rule - attribute + attr

RuleTagAttributeExistValue extends Rule - attribute + attr + value

RuleTagCount - attribute + limit

SEOUtilsManager - attribute + chain + reader + writer + oDom - methods + init + read + check + write

Reader - methods + read + getDoc ReaderFile extends Reader - attribute + filePath ReaderStream extends Reader - attribute + stream

Writer - attribute + data - methods + write

WriterFile extends Writer - attribute + filePath WriterStream extends Writer

WriterConsole extends Writer