ParseComplexValue parses a complex value string into node.

ParseTmcf parses TMCF into a map with key of the table name, and value being the TableSchema struct.

Arrow is the symbol in schema mapping between table name and table column.

PreC is the prefix for Column.

PreE is the prefix for Entity.

ReferenceDelimiter is the delimiter for schema namespace.

Triple represents Triples table name.

TypeOf represents "typeOf" literal.

Column represents a csv column' node and property.

TableSchema Represents the schema of one table.