Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: V1: A Visual Query Language for Property Graphs   The property graph is an increasingly popular data model. Pattern
construction and pattern matching are important tasks when dealing with
property graphs. Given a property graph schema S, a property graph G, and a
query pattern P, all expressed in language L, pattern matching is the process
of finding, merging, and annotating subgraphs of G that match P. Expressive
pattern languages support topological constraints, property values constraints,
negations, quantifications, aggregations, and path semantics. Calculated
properties may be defined for vertices, edges, and subgraphs, and constraints
may be imposed on their evaluation result.
  Query posers would like to construct patterns with minimal effort, minimal
trial and error, and in a manner that is coherent with the way they think. The
ability to express patterns in a way that is aligned with their mental
processes is crucial to the flow of their work and to the quality of the
insights they can draw.
  Since the capabilities of the human visual system with respect to pattern
perception are remarkable, it is a matter of course that query patterns were to
be expressed visually. Visual query languages have the potential to be much
more 'user-friendly' than their textual counterparts in the sense that patterns
may be constructed and understood much more quickly and with much less mental
effort. A long-standing challenge is to design a visual query language that is
generic, has rich expressive power, and is highly receptive and productive. V1
attempts to answer this challenge.
  V1 is a declarative visual pattern query language for schema-based property
graphs. V1 supports property graphs with mixed (both directed and undirected)
edges and unary edges, with multivalued and composite properties, and with null
property values. V1 is generic, concise, has rich expressive power, and is
highly receptive and productive.

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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph