  The scientific community has been studying graph data models for decades.
Their high expressiveness and elasticity led the scientific community to design
a variety of graph data models and graph query languages, and the practitioners
to use them to model real-world cases and extract useful information. Recently,
property graphs and, in particular, Cypher 9 (the first open version of the
well-known Neo4j Inc.'s language) are gaining popularity. Practitioners find
Cypher useful and applicable in many scenarios. However, we are living in a
streaming world where data continuously flows. A growing number of Cypher's
users show interest in continuously querying graph data to act in a timely
fashion. Indeed, Cypher lacks the features for dealing with streams of (graph)
data and continuous query evaluation. In this work, we propose Seraph, an
extension of Cypher, as a first attempt to introduce streaming features in the
context of property graph query languages. Specifically, we define Seraph
semantics, we propose a first version of Seraph syntax, and we discuss the
potential impacts from a user perspective.
