Token:
| "TEXT"
| "START_TAG_NAME"
| "START_TAG_CLOSING"
| "START_TAG_SELF_CLOSING"
| "END_TAG_NAME"
| "ATTRIBUTE_NAME"
| "ATTRIBUTE_VALUE"
| "COMMENT"
| "PROCESSING_INSTRUCTION_TARGET"
| "PROCESSING_INSTRUCTION_DATA"
| "CDATA_SECTION"
| "DOCTYPE_NAME"
A token that can be read from a text.