RDF Graph Measures for the Analysis of RDF Graphs

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Measures

Notation Description Value
m graph volume (no. of edges) 343,733
n graph size (no. of vertices) 84,806
dmax max degree 33,394
d+max max in-degree 16,696
d-max max out-degree 16,698
z mean total degree 8.106
h+
h-index, respecting in-degree
Known from citation networks, this measure is an indicator for the importance of a vertex in the graph, similar to a centrality measure. A value of h means that for the number of h vertices the degree of these vertices is greater or equal to h. A high value of h could be an indicator for a "dense" graph and that its vertices are more "prestigious". The value is computed by respecting the in-degree distribution of the graph, denoted as h+.
123
h h-index, respecting total degree 171
pmu fill, respecting unique edges only 0
p fill, respecting overall edges 0
mp
Effective measure!Score: 0.045

Datasets in this domain can be very well described by means of this particular measure.

parallel edges
Based on the measure mu, this is the number of parallel edges, i.e., the total number of edges that share the same pair of source and target vertices. It is computed by subtracting mu from the total number of edges m, i.e. mp = m – mu.
131,185
mu
unique edges
In RDF, a pair of subject and object resources may be described with more than one predicate. Hence, in the graphs, there may exist a fraction of all edges that share the same pair of (subject and object) vertices. The value for mu represents the total number of edges without counting these multiple edges between a pair of vertices.
212,548
y reciprocity 0.652
δ
diameter (approximated)
The diameter is the longest shortest path between a pair of two vertices in the graph (as there can be more than one path for the pair of vertices). As this requires all possible paths to be computed, this is a very computational intensive measure. We used the pseudo_diameter-algorithm provided by graph-tool, which is an approximation method for the diameter of the graph. As the graph can have many components, this algorithm very often returns the value of 1. If this should be the case for this graph, we compute the diameter for the largest connecting component.
7
PR max pagerank value 0.006
Cd+ max in-degree centrality 0.197
Cd- max out-degree centrality 0.197
Cd max degree centrality 0.394
α powerlaw exponent, degree distribution 2.393
dminα dmin for α 447
α+ powerlaw exponent, in-degree distribution 2.31
dminα+ dmin for α+ 227
σ+ standard deviation, in-degree distribution 73.558
σ- standard deviation, out-degree distribution 63.261
cv+ coefficient variation, in-degree distribution 1,814.81
cv-
Effective measure!Score: 0.047

Datasets in this domain can be very well described by means of this particular measure.

coefficient variation, out-degree distribution 1,560.78
σ2+ variance, in-degree distribution 5,410.703
σ2- variance, out-degree distribution 4,001.939
C+d graph centralization 0.394
z- mean out-degree 9.832
deg(G) max partial out-degree 8,347
deg(G) mean partial out-degree 2.13
degL(G)
Effective measure!Score: 0.099

Datasets in this domain can be very well described by means of this particular measure.

max labelled out-degree 16
degL(G) mean labelled out-degree 4.615
degD(G) max direct out-degree 8,350
degD(G) mean direct out-degree 6.08
z+ mean in-degree 5.482
deg++(G) max partial in-degree 9,759
deg++(G) mean partial in-degree 3.192
degL+(G) max labelled in-degree 7
degL+(G) mean labelled in-degree 1.718
degD+(G) max direct in-degree 9,760
degD+(G)
Effective measure!Score: 0.128

Datasets in this domain can be very well described by means of this particular measure.

mean direct in-degree 3.39
degP(G) max predicate degree 55,385
degP(G) mean predicate degree 5,728.883
degP+(G) max predicate in-degree 31,417
degP+(G) mean predicate in-degree 2,688.933
degP(G) max predicate out-degree 21,683
degP(G) mean predicate out-degree 1,794.9
so(G) subject-object ratio 0.152
rL(G) ratio of repreated predicate lists 0.987
degPL(G)
Effective measure!Score: 0.047

Datasets in this domain can be very well described by means of this particular measure.

max predicate list degree 13,402
degPL(G)
Effective measure!Score: 0.129

Datasets in this domain can be very well described by means of this particular measure.

mean predicate list degree 78.208
CG
Effective measure!Score: 0.06

Datasets in this domain can be very well described by means of this particular measure.

distinct classes 38
SGC all different typed subjects 12,717
rT(G) ratio of typed subjects 0.364

Plots

Degree distribution shown here
In-degree distribution shown here
Last update of this page: 25 March 2020 13:38:38 CET