[r-t] Definitions so far
richard at ex-parrot.com
Tue Jan 20 12:54:43 UTC 2015
I think I'm now happy with the next section of my
definitions. These remove the definition of /change
ringing/ from my last email. I think the only controversial
point is my decision to allow a 5001 of Triples as a peal
length performance. (This does not necessarily mean it is
allowed as a peal; in fact I don't propose to address that
point fully. Hopefully this will become clearer when I move
on to truth which will be the next section.)
D. Definitions concerning change ringing
1. A /block/ is a sequence of rows where the progression
between rows is defined by changes. A /sub-block/ of some
block is a sequence of contiguous rows from that block. It
too is a block.
2. When a block is a sub-block of some larger block and does
not include the last row of the larger block, it additionally
has a /block-end change/. This is the change describing the
progression from the last row of the block to the first row
not in the block. A block without a block-end change is
called a /terminal block/, and a block with one, a
4. /Change ringing/ is the practice of ringing without
break a block of rows known as a /performance/.
5. A performance consists of up to three parts which in order
(a) optionally an /opening block/ containing rows
incidental to the main performance;
(b) the /primary block/ containing the main part of the
(c) optionally a /closing block/ containing further rows
that are incidental to the main performance.
Usually the opening block and closing block constists of just
rounds, and referred to as the /opening rounds/ and /closing
rounds/, respectively. When discussing a performance, it is
normal to ignore the opening and closing blocks and refer just
to the properties of the primary block.
6. The /length/ of a block is the number of rows it contains.
A non-terminal block of length n will have n changes,
including the block-end change; a terminal block will only
have n-1 changes. The length of a performance is deemed to be
the length of its primary block.
7. A performance of length 5000 or more may be described as a
/peal length performance/. A performance of length 10,000 or
more may be described as a /long length performance/. A
performance of length 1250 or more may be described as a
/quarter peal length performance/. Other fractional peal
lengths are defined in a similar manner but are less commonly
8. A /round block/ is a non-terminal block whose first row is
the same as the row produced by applying the block-end change
to the last row. Usually the primary block of a performance
will be a round block whose first row is rounds.
More information about the ringing-theory