Add or query keywords of message.
keywords(msg, ..., append = FALSE)
A message object.
Keywords.
Whether to append or replace keywords.
A message object or the comments of the message object (if comments
is NULL
).
# Create a message and set the keywords.
envelope() %>% keywords("newsletter, marketing")
envelope() %>% keywords("newsletter", "marketing")
envelope() %>% keywords(c("newsletter", "marketing"))
# Retrieve the keywords for a message.
msg <- envelope() %>% keywords("newsletter, marketing")
keywords(msg)
#> [1] "newsletter, marketing"