Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contextual Graph Attention for Answering Logical Queries over Incomplete
  Knowledge Graphs   Recently, several studies have explored methods for using KG embedding to
answer logical queries. These approaches either treat embedding learning and
query answering as two separated learning tasks, or fail to deal with the
variability of contributions from different query paths. We proposed to
leverage a graph attention mechanism to handle the unequal contribution of
different query paths. However, commonly used graph attention assumes that the
center node embedding is provided, which is unavailable in this task since the
center node is to be predicted. To solve this problem we propose a multi-head
attention-based end-to-end logical query answering model, called Contextual
Graph Attention model(CGA), which uses an initial neighborhood aggregation
layer to generate the center embedding, and the whole model is trained jointly
on the original KG structure as well as the sampled query-answer pairs. We also
introduce two new datasets, DB18 and WikiGeo19, which are rather large in size
compared to the existing datasets and contain many more relation types, and use
them to evaluate the performance of the proposed model. Our result shows that
the proposed CGA with fewer learnable parameters consistently outperforms the
baseline models on both datasets as well as Bio dataset.

22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ