Documentation fixes

doc/zmq.txt

@@ -62,7 +62,8 @@ Messages
 ~~~~~~~~
 A 0MQ message is a discrete unit of data passed between applications or
 components of the same application. 0MQ messages have no internal structure and
-from the point of view of 0MQ itself they are considered to be opaque BLOBs.
+from the point of view of 0MQ itself they are considered to be opaque binary
+data.
 
 The following functions are provided to work with messages:
 

doc/zmq_bind.txt

@@ -25,7 +25,7 @@ the underlying transport protocol selected.
 The following transports are defined:
 
 'tcp':: unicast transport using TCP, see linkzmq:zmq_tcp[7]
-'pgm', 'udp':: reliable multicast transport using PGM, see linkzmq:zmq_pgm[7]
+'pgm', 'epgm':: reliable multicast transport using PGM, see linkzmq:zmq_pgm[7]
 'ipc':: local inter-process communication transport, see linkzmq:zmq_ipc[7]
 'inproc':: local in-process (inter-thread) communication transport, see linkzmq:zmq_inproc[7]
 
@@ -37,7 +37,7 @@ addresses using _zmq_connect()_.
 RETURN VALUE
 ------------
 The _zmq_bind()_ function shall return zero if successful. Otherwise it shall
-return -1 and set 'errno' to one of the values defined below.
+return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_close.txt

@@ -26,7 +26,7 @@ also be dropped.
 RETURN VALUE
 ------------
 The _zmq_close()_ function shall return zero if successful. Otherwise it shall
-return -1 and set 'errno' to one of the values defined below.
+return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_connect.txt

@@ -25,7 +25,7 @@ the underlying transport protocol selected.
 The following transports are defined:
 
 'tcp':: unicast transport using TCP, see linkzmq:zmq_tcp[7]
-'pgm', 'udp':: reliable multicast transport using PGM, see linkzmq:zmq_pgm[7]
+'pgm', 'epgm':: reliable multicast transport using PGM, see linkzmq:zmq_pgm[7]
 'ipc':: local inter-process communication transport, see linkzmq:zmq_ipc[7]
 'inproc':: local in-process (inter-thread) communication transport, see linkzmq:zmq_inproc[7]
 
@@ -41,7 +41,7 @@ physical connection was or can actually be established.
 RETURN VALUE
 ------------
 The _zmq_connect()_ function shall return zero if successful. Otherwise it
-shall return -1 and set 'errno' to one of the values defined below.
+shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_flush.txt

@@ -30,7 +30,7 @@ the queued messages *may* be flushed as a single batch.
 RETURN VALUE
 ------------
 The _zmq_flush()_ function shall return zero if successful. Otherwise it shall
-return -1 and set 'errno' to one of the values defined below.
+return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_msg_close.txt

@@ -30,7 +30,7 @@ _zmq_msg_ family of functions.
 RETURN VALUE
 ------------
 The _zmq_msg_close()_ function shall return zero if successful. Otherwise
-it shall return -1 and set 'errno' to one of the values defined below.
+it shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_msg_copy.txt

@@ -32,7 +32,7 @@ _zmq_msg_ family of functions.
 RETURN VALUE
 ------------
 The _zmq_msg_copy()_ function shall return zero if successful. Otherwise it
-shall return -1 and set 'errno' to one of the values defined below.
+shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_msg_init.txt

@@ -25,7 +25,7 @@ _zmq_msg_ family of functions.
 RETURN VALUE
 ------------
 The _zmq_msg_init()_ function shall return zero if successful. Otherwise it
-shall return -1 and set 'errno' to one of the values defined below.
+shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_msg_init_data.txt

@@ -32,7 +32,7 @@ _zmq_msg_ family of functions.
 RETURN VALUE
 ------------
 The _zmq_msg_init_data()_ function shall return zero if successful. Otherwise
-it shall return -1 and set 'errno' to one of the values defined below.
+it shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_msg_init_size.txt

@@ -29,7 +29,7 @@ _zmq_msg_ family of functions.
 RETURN VALUE
 ------------
 The _zmq_msg_init_size()_ function shall return zero if successful. Otherwise
-it shall return -1 and set 'errno' to one of the values defined below.
+it shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_msg_move.txt

@@ -27,7 +27,7 @@ _zmq_msg_ family of functions.
 RETURN VALUE
 ------------
 The _zmq_msg_move()_ function shall return zero if successful. Otherwise it
-shall return -1 and set 'errno' to one of the values defined below.
+shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_poll.txt

@@ -42,9 +42,10 @@ bit corresponding to the event condition in the 'revents' member.
 
 If none of the requested events have occured on any *zmq_pollitem_t* item,
 _zmq_poll()_ shall wait up to 'timeout' microseconds for an event to occur on
-any of the requested items. If the value of 'timeout' is 0, _zmq_poll()_ shall
-return immediately. If the value of 'timeout' is -1, _zmq_poll()_ shall wait
-indefinitely for requested events to occur.
+any of the requested items. If the value of 'timeout' is `0`, _zmq_poll()_
+shall return immediately. If the value of 'timeout' is `-1`, _zmq_poll()_ shall
+block indefinitely until a requested event has occured on at least one
+*zmq_pollitem_t*.
 
 The 'events' and 'revents' members of *zmq_pollitem_t* are bitmasks constructed
 by OR'ing a combination of the following event flags:
@@ -78,9 +79,9 @@ of those interfaces in ways not defined in this documentation.
 RETURN VALUE
 ------------
 Upon successful completion, the _zmq_poll()_ function shall return the number
-of *zmq_pollitem_t* structures with events signaled in 'revents' or 0 if the
+of *zmq_pollitem_t* structures with events signaled in 'revents' or `0` if the
 'timeout' period has expired and no events have been signaled. Upon failure,
-_zmq_poll()_ shall return -1 and set 'errno' to one of the values defined
+_zmq_poll()_ shall return `-1` and set 'errno' to one of the values defined
 below.
 
 
@@ -97,7 +98,7 @@ associated 0MQ 'context' was initialised without the 'ZMQ_POLL' flag.
 
 EXAMPLE
 -------
-.Polling idenfinitely for input events on both a 0MQ socket and a standard socket.
+.Polling indefinitely for input events on both a 0MQ socket and a standard socket.
 ----
 zmq_pollitem_t items [2];
 /* First item refers to 0MQ socket 'socket' */

doc/zmq_recv.txt

@@ -32,7 +32,7 @@ to EAGAIN.
 RETURN VALUE
 ------------
 The _zmq_recv()_ function shall return zero if successful. Otherwise it shall
-return -1 and set 'errno' to one of the values defined below.
+return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_send.txt

@@ -39,7 +39,7 @@ responsibility for the message.
 RETURN VALUE
 ------------
 The _zmq_send()_ function shall return zero if successful. Otherwise it shall
-return -1 and set 'errno' to one of the values defined below.
+return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_setsockopt.txt

@@ -109,7 +109,7 @@ queue_ limits shall be shared with previous run(s) and so on.
 Identity should be at least one byte and at most 255 bytes long. Identities
 starting with binary zero are reserved for use by 0MQ infrastructure.
 
-Option value type:: BLOB
+Option value type:: binary data
 Option value unit:: N/A
 Default value:: NULL
 Applicable socket types:: all
@@ -127,7 +127,7 @@ with the specified prefix. Mutiple filters may be attached to a single
 'ZMQ_SUB' socket, in which case a message shall be accepted if it matches at
 least one filter.
 
-Option value type:: BLOB
+Option value type:: binary data
 Option value unit:: N/A
 Default value:: N/A
 Applicable socket types:: ZMQ_SUB
@@ -141,7 +141,7 @@ established with the 'ZMQ_SUBSCRIBE' option. If the socket has several
 instances of the same filter attached the 'ZMQ_UNSUBSCRIBE' option shall remove
 only one instance, leaving the rest in place and functional.
 
-Option value type:: BLOB
+Option value type:: binary data
 Option value unit:: N/A
 Default value:: N/A
 Applicable socket types:: ZMQ_SUB
@@ -150,8 +150,7 @@ Applicable socket types:: ZMQ_SUB
 ZMQ_RATE: Set multicast data rate
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 The 'ZMQ_RATE' option shall set the maximum send or receive data rate for
-multicast transports such as linkzmq:zmq_pgm[7] and linkzmq:zmq_udp[7] using
-the specified 'socket'.
+multicast transports such as linkzmq:zmq_pgm[7] using the specified 'socket'.
 
 Option value type:: uint64_t
 Option value unit:: kilobits per second
@@ -162,10 +161,9 @@ Applicable socket types:: all, when using multicast transports
 ZMQ_RECOVERY_IVL: Set multicast recovery interval
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 The 'ZMQ_RECOVERY_IVL' option shall set the recovery interval for multicast
-transports such as linkzmq:zmq_pgm[7] and linkzmq:zmq_udp[7] using the
-specified 'socket'. The recovery interval determines the maximum time in
-seconds that a receiver can be absent from a multicast group before
-unrecoverable data loss will occur.
+transports such as linkzmq:zmq_pgm[7] using the specified 'socket'. The
+recovery interval determines the maximum time in seconds that a receiver can be
+absent from a multicast group before unrecoverable data loss will occur.
 
 CAUTION: Excersize care when setting large recovery intervals as the data
 needed for recovery will be held in memory. For example, a 1 minute recovery
@@ -221,7 +219,7 @@ Applicable socket types:: all
 RETURN VALUE
 ------------
 The _zmq_setsockopt()_ function shall return zero if successful. Otherwise it
-shall return -1 and set 'errno' to one of the values defined below.
+shall return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS

doc/zmq_socket.txt

@@ -16,7 +16,7 @@ DESCRIPTION
 -----------
 The 'zmq_socket()' function shall create a 0MQ socket within the specified
 'context' and return an opaque handle to the newly created socket. The 'type'
-argument specifies the _messaging pattern_, which determines the semantics of
+argument specifies the socket type, which determines the semantics of
 communication over the socket.
 
 The following _messaging patterns_ are defined:
@@ -96,8 +96,9 @@ Socket type:: 'ZMQ_DOWNSTREAM'
 Compatible peer sockets:: 'ZMQ_UPSTREAM'
 
 A socket of type 'ZMQ_DOWNSTREAM' is used by a _component_ of a pipeline to
-send messages to downstream stages of the pipeline. The _zmq_recv()_ function
-is not implemented for this socket type.
+send messages to downstream stages of the pipeline. Messages are load-balanced
+to all connected downstream _components_. The _zmq_recv()_ function is not
+implemented for this socket type.
 
 
 RETURN VALUE

doc/zmq_term.txt

@@ -24,7 +24,7 @@ delayed until the last socket within it is closed.
 RETURN VALUE
 ------------
 The _zmq_term()_ function shall return zero if successful. Otherwise it shall
-return -1 and set 'errno' to one of the values defined below.
+return `-1` and set 'errno' to one of the values defined below.
 
 
 ERRORS