Start of Heading

The start of heading is the second Unicode character, being U+0001, succeeds Null and precedes Start of Text, it is a transmission control. It's in the Basic Latin block in the Basic Multilingual Plane.

Transmission Control
As a transmission control character, it's used to mark a non-data section of a data stream—the part of a stream containing addresses and other housekeeping data, in other words, in data, it marks a part of data that's not data in the data stream, from a data provider, in which a data stream contains data for house-like things and it notes those things for the person or thing viewing the data to realize such and then to do something. The reason why it's called "Start of heading" is unknown but it is believed to be called such due to the fact that this character starts searching at the beginning of the data, possibly data header.

Message Transmission
In message transmission, delimits the start of a message header. The format of this header may be defined by an applicable protocol, such as IPTC 7901 for journalistic text transmission, and it is usually terminated by Start of Text. In Hadoop, it is often used as a field separator.

Other Uses

 * (Normally in documents) To represent the start of a heading

Encodings
In a link or in HTML it is %01, attempting to search this character won't give you results and adding this character (normally) will render as the replacement character.

Other
Currently nothing.