The default key: the exchange and the symbol, NSE:INFY, or the symbol
alone when there is no exchange. Each part is URI-encoded, so a colon
inside a symbol cannot make two instruments one key. Null when the symbol
is missing or blank. Case is kept: the host decides whether infy and
INFY are one instrument, and the widget uppercases symbols itself.
The default key: the exchange and the symbol,
NSE:INFY, or the symbol alone when there is no exchange. Each part is URI-encoded, so a colon inside a symbol cannot make two instruments one key. Null when the symbol is missing or blank. Case is kept: the host decides whetherinfyandINFYare one instrument, and the widget uppercases symbols itself.