  Blended modeling is an approach that enables users to interact with a model
via multiple notations. In this context, there is a growing need for
open-source industry-grade exemplars of languages with available language
engineering artifacts, in particular, editors and notations for supporting the
creation of models based on a single metamodel in different representations
(e.g., textual, graphical, and tabular ones). These exemplars can support the
development of advanced solutions to address the practical challenges posed by
blended modeling requirements.
  As one such exemplar, this paper introduces EATXT, a textual concrete syntax
for automotive architecture modeling with EAST-ADL, developed in cooperation
with an industry partner in the automotive domain. The EATXT editor is based on
Xtext and provides basic and advanced features, such as an improved
content-assist and serialization specifically addressing blended modeling
requirements. We present the editor features and architecture, the
implementation approach, and previous use of EATXT in research. The EATXT
editor is publicly available, rendering it a valuable resource for language
developers.
