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What is the difference between zero-altered and zero-inflated?

What is the difference between zero-altered and zero-inflated?

startz, Based on my limited knowledge, both zero-inflated and -altered poisson models have two components: binary and county processes. However, they differ in terms of whether the count model is truncated at zero or not. Zero-inflated poisson models include zeros in both the binary and count processes, while zero-altered poisson models do not incorporate zeros in the count process with zeros being included in the binary process. I hope this is helpful.

Thank you. I didn't know that. By the way, Greene's textbook suggests that under some circumstances the two terms are used interchangeably.)