SUB or XSUB?

[timsu92]

I'm reading zguide, and I can't really understand what I should do here.

In the diagram, it says I should use XSUB and XPUB, but in the following words, it says I should use SUB and PUB. In the example codes, both are used.
So, what's the one? I guess they all should be XSUB and XPUB right?

[shishirpy]

The following section explains why you need the XPUB and XSUB sockets, https://zguide.zeromq.org/docs/chapter2/#The-Dynamic-Discovery-Problem
Look at Figure 14 and the description below it.

[timsu92]

Thank you for replying me!

In that section, it tells us that XSUB and XPUB are used as mediators, right?

As the proxy in figure 18 sits in the between, I guess the figure, which uses "XSUB" and "XPUB", is right, while the text below that says "SUB" and "PUB" is improper.

[shishirpy]

Yes, you are right. It should say XSUB and XPUB in the text.

[timsu92]

OK, I'm proposing a pull request