<Table> <Tr> <Td> </Td> <Td> Parts of this article (those related to HTML 5) need to be updated . Please update this article to reflect recent events or newly available information . (July 2018) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Parts of this article (those related to HTML 5) need to be updated . Please update this article to reflect recent events or newly available information . (July 2018) </Td> </Tr> <P> The HTML 4 DTDs define 252 named entities, references to which act as mnemonic aliases for certain Unicode characters . The HTML 4 specification requires the use of the standard DTDs and does not allow users to define additional entities . </P> <P> In the table below, the "Standard" column indicates the first version of the HTML DTD that defines the character entity reference . HTML 4.01 does not provide any new character references . </P>

What are html character entities are used for
find me the text answering this question