Semi E134.1
SEMI E134.1 defines the SOAP web-service binding for Data Collection Management — the actual WSDL-defined operations for creating, activating, modifying, and freezing a data-collection plan, plus the SOAP envelope structure and XML schema for the resulting data stream — rather than the general plan-creation/activation/freeze-protection behavior E134 establishes. E134 says a host should be able to request "parameters 3, 7, and 12, sampled every 100 milliseconds" and get back a standardized, version-protected collection plan; E134.1 is the transport-binding companion that fixes precisely how a host actually issues those requests and receives that stream over the web-services infrastructure the EDA/Interface A ecosystem (E125.1, E164, and the rest of that family) already runs on, the same relationship E125.1 has to E125.
The reason E134 needed a dedicated transport-binding standard is that the EDA/Interface A ecosystem already runs on web-services infrastructure, and "a host can create and manage a data-collection plan" by itself doesn't specify whether that plan-management happens via SOAP, REST, or some other mechanism — without E134.1, a host integrator writing a DCM client would have to guess or negotiate per vendor how to actually issue a plan request and receive the resulting stream, defeating the point of a collection-management standard that's supposed to make high-rate data acquisition consistent across tools. E134.1 closes that gap by binding plan management and data delivery to the same SOAP/WSDL pattern the rest of the Interface A family already uses, so a host's existing SOAP-based EDA infrastructure can add DCM plan control as one more standard set of calls rather than a bolted-on, vendor-specific mechanism.
E134.1 completes DCM the same way every ".1" protocol binding completes its base standard: E134 defines what a data-collection plan has to support, and E134.1 is the fixed SOAP/WSDL message set that makes creating, activating, modifying, and freezing that plan identical across equipment vendors, so a fab's host software never has to special-case high-rate data acquisition by brand.