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LABELs removed from the documentation
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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@ -39,19 +39,6 @@ Default value:: N/A
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Applicable socket types:: all
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ZMQ_RCVLABEL: Inquires whether last message received was a label
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The 'ZMQ_RCVLABEL' option shall return True (1) if the message part last
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received from the 'socket' was an address label. Otherwise, this option
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shall return False (0).
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[horizontal]
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Option value type:: int
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Option value unit:: boolean
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Default value:: N/A
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Applicable socket types:: all
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ZMQ_RCVMORE: More message data parts to follow
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The 'ZMQ_RCVMORE' option shall return True (1) if the message part last
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@ -29,8 +29,7 @@ function shall fail with 'errno' set to EAGAIN.
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Multi-part messages
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~~~~~~~~~~~~~~~~~~~
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A 0MQ message is composed of 1 or more message parts, starting with zero or
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more address 'label' parts, followed by 1 or more 'data' parts. Each message
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A 0MQ message is composed of 1 or more message parts. Each message
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part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic
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delivery of messages; peers shall receive either all _message parts_ of a
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message or none at all. The total number of message parts is unlimited except
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@ -38,9 +37,7 @@ by available memory.
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An application that processes multipart messages must use the _ZMQ_RCVMORE_
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linkzmq:zmq_getsockopt[3] option after calling _zmq_recv()_ to determine if
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there are further parts to receive. An application that manipulates address
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labels must use _ZMQ_RCVLABEL_ to determine the zero or more label parts
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that precede the data part(s).
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there are further parts to receive.
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RETURN VALUE
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------------
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@ -29,8 +29,7 @@ function shall fail with 'errno' set to EAGAIN.
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Multi-part messages
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~~~~~~~~~~~~~~~~~~~
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A 0MQ message is composed of 1 or more message parts, starting with zero or
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more address 'label' parts, followed by 1 or more 'data' parts. Each message
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A 0MQ message is composed of 1 or more message parts. Each message
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part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic
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delivery of messages; peers shall receive either all _message parts_ of a
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message or none at all. The total number of message parts is unlimited except
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@ -38,9 +37,7 @@ by available memory.
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An application that processes multipart messages must use the _ZMQ_RCVMORE_
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linkzmq:zmq_getsockopt[3] option after calling _zmq_recvmsg()_ to determine if
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there are further parts to receive. An application that manipulates address
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labels must use _ZMQ_RCVLABEL_ to determine the zero or more label parts
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that precede the data part(s).
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there are further parts to receive.
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RETURN VALUE
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@ -23,11 +23,6 @@ Specifies that the operation should be performed in non-blocking mode. If the
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message cannot be queued on the 'socket', the _zmq_send()_ function shall
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fail with 'errno' set to EAGAIN.
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*ZMQ_SNDLABEL*::
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Specifies that the message part being sent is an address label, and that
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further message parts are to follow. Refer to linkzmq:zmq_socket[3] for the
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semantics of address labels in each socket pattern.
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*ZMQ_SNDMORE*::
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Specifies that the message being sent is a multi-part message, and that further
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message parts are to follow. Refer to the section regarding multi-part messages
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@ -40,16 +35,14 @@ the 'socket' and 0MQ has assumed responsibility for the message.
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Multi-part messages
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~~~~~~~~~~~~~~~~~~~
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A 0MQ message is composed of 1 or more message parts, starting with zero or
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more address 'label' parts, followed by 1 or more 'data' parts. Each message
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A 0MQ message is composed of 1 or more message parts. Each message
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part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic
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delivery of messages; peers shall receive either all _message parts_ of a
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message or none at all. The total number of message parts is unlimited except
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by available memory.
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An application that sends multipart messages must use the _ZMQ_SNDMORE_ flag
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when sending each data part except the final one. An application that sends
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address labels must use _ZMQ_SNDLABEL_ when sending each label.
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when sending each data part except the final one.
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RETURN VALUE
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@ -23,11 +23,6 @@ Specifies that the operation should be performed in non-blocking mode. If the
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message cannot be queued on the 'socket', the _zmq_sendmsg()_ function shall
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fail with 'errno' set to EAGAIN.
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*ZMQ_SNDLABEL*::
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Specifies that the message part being sent is an address 'label', and that
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further message parts are to follow. Refer to linkzmq:zmq_socket[3] for the
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semantics of address labels in each socket pattern.
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*ZMQ_SNDMORE*::
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Specifies that the message being sent is a multi-part message, and that further
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message parts are to follow. Refer to the section regarding multi-part messages
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@ -44,16 +39,14 @@ the 'socket' and 0MQ has assumed responsibility for the message.
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Multi-part messages
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~~~~~~~~~~~~~~~~~~~
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A 0MQ message is composed of 1 or more message parts, starting with zero or
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more address 'label' parts, followed by 1 or more 'data' parts. Each message
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A 0MQ message is composed of 1 or more message parts. Each message
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part is an independent 'zmq_msg_t' in its own right. 0MQ ensures atomic
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delivery of messages; peers shall receive either all _message parts_ of a
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message or none at all. The total number of message parts is unlimited except
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by available memory.
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An application that sends multipart messages must use the _ZMQ_SNDMORE_ flag
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when sending each data part except the final one. An application that sends
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address labels must use _ZMQ_SNDLABEL_ when sending each label.
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when sending each data part except the final one.
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RETURN VALUE
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------------
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@ -81,11 +81,6 @@ any linkzmq:zmq_send[3] operations on the socket shall block until the
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exceptional state ends or at least one _service_ becomes available for sending;
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messages are not discarded.
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'ZMQ_REQ' socket adds a unique 'request ID' label to every outbound message.
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When receiving a reply, it checks whether the 'request ID' of the reply matches
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the last 'request ID' sent. If it does not, the message is silently dropped and
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waiting for the reply is resumed.
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[horizontal]
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.Summary of ZMQ_REQ characteristics
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Compatible peer sockets:: 'ZMQ_REP'
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@ -108,10 +103,6 @@ When a 'ZMQ_REP' socket enters an exceptional state due to having reached the
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high water mark for a _client_, then any replies sent to the _client_ in
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question shall be dropped until the exceptional state ends.
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'ZMQ_REP' socket strips all the labels from the incoming message, stores them
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and passes the remaining data parts to the user. When user sends the reply,
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the stored labels are re-attached to the reply.
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[horizontal]
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.Summary of ZMQ_REP characteristics
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Compatible peer sockets:: 'ZMQ_REQ'
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@ -136,8 +127,6 @@ linkzmq:zmq_send[3] operations on the socket shall block until the exceptional
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state ends or at least one peer becomes available for sending; messages are not
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discarded.
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'ZMQ_XREQ' socket doesn't inspect or modify the message labels.
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[horizontal]
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.Summary of ZMQ_XREQ characteristics
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Compatible peer sockets:: 'ZMQ_XREP', 'ZMQ_REP'
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@ -162,14 +151,6 @@ messages sent to the socket shall be dropped until the exceptional state ends.
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Likewise, any messages to be routed to a non-existent peer or a peer for which
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the individual high water mark has been reached shall also be dropped.
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When receiving messages a 'ZMQ_XREP' socket attaches a label uniquely
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identifying the originating peer to the message before passing it to the
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application.
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When sending messages a 'ZMQ_XREP' socket removes the first label from the
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message and uses it to determine which the peer the message shall be routed to.
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If the peer does not exist anymore the message is silently discarded.
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[horizontal]
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.Summary of ZMQ_XREP characteristics
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Compatible peer sockets:: 'ZMQ_XREQ', 'ZMQ_REQ'
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@ -196,8 +177,6 @@ high water mark for a _subscriber_, then any messages that would be sent to the
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_subscriber_ in question shall instead be dropped until the exceptional state
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ends. The _zmq_send()_ function shall never block for this socket type.
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This socket type doesn't use message labels.
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[horizontal]
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.Summary of ZMQ_PUB characteristics
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Compatible peer sockets:: 'ZMQ_SUB', 'ZMQ_XSUB'
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@ -215,8 +194,6 @@ any messages, use the 'ZMQ_SUBSCRIBE' option of linkzmq:zmq_setsockopt[3] to
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specify which messages to subscribe to. The _zmq_send()_ function is not
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implemented for this socket type.
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This socket type doesn't use message labels.
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[horizontal]
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.Summary of ZMQ_SUB characteristics
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Compatible peer sockets:: 'ZMQ_PUB', 'ZMQ_XPUB'
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@ -233,8 +210,6 @@ in form of incoming messages. Subscription message is a byte 1 (for
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subscriptions) or byte 0 (for unsubscriptions) followed by the subscription
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body.
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This socket type doesn't use message labels.
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[horizontal]
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.Summary of ZMQ_XPUB characteristics
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Compatible peer sockets:: 'ZMQ_SUB', 'ZMQ_XSUB'
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@ -250,8 +225,6 @@ Same as ZMQ_SUB except that you subscribe by sending subscription messages to
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the socket. Subscription message is a byte 1 (for subscriptions) or byte 0
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(for unsubscriptions) followed by the subscription body.
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This socket type doesn't use message labels.
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[horizontal]
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.Summary of ZMQ_XSUB characteristics
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Compatible peer sockets:: 'ZMQ_PUB', 'ZMQ_XPUB'
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@ -282,8 +255,6 @@ _nodes_ at all, then any linkzmq:zmq_send[3] operations on the socket shall
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block until the exceptional state ends or at least one downstream _node_
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becomes available for sending; messages are not discarded.
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This socket type doesn't use message labels.
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[horizontal]
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.Summary of ZMQ_PUSH characteristics
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Compatible peer sockets:: 'ZMQ_PULL'
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@ -301,8 +272,6 @@ from upstream pipeline _nodes_. Messages are fair-queued from among all
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connected upstream _nodes_. The _zmq_send()_ function is not implemented for
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this socket type.
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This socket type doesn't use message labels.
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[horizontal]
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.Summary of ZMQ_PULL characteristics
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Compatible peer sockets:: 'ZMQ_PUSH'
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@ -330,8 +299,6 @@ high water mark for the connected peer, or if no peer is connected, then
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any linkzmq:zmq_send[3] operations on the socket shall block until the peer
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becomes available for sending; messages are not discarded.
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This socket type doesn't use message labels.
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NOTE: 'ZMQ_PAIR' sockets are experimental, and are currently missing several
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features such as auto-reconnection.
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