Graph-based Analysis of Datasets in the LOD Cloud

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environmental-applications-reference-thesaurus

Data and Resources

Measures as csv

Measures

Notation	Description	Value
m	graph volume (no. of edges)	`251,396`
n	graph size (no. of vertices)	`65,448`
d_max	max degree	`14,353`
d⁺_max	max in-degree	`14,351`
d^-_max Effective measure!Score: `0.06` Datasets in this domain can be very well described by means of this particular measure.	max out-degree	`966`
z	mean total degree	`7.682`
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₊.`	`78`
h	h-index, respecting total degree	`128`
p_{m_u}	fill, respecting unique edges only	`0`
p	fill, respecting overall edges	`0`
m_p Effective measure!Score: `0.09` Datasets in this domain can be very well described by means of this particular measure.	parallel edges Based on the measure `m_u`, 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 `m_u` from the total number of edges `m`, i.e. `m_p = m – m_u`.	`132,745`
m_u	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 `m_u` represents the total number of edges without counting these multiple edges between a pair of vertices.	`118,651`
y	reciprocity	`0.38`
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.	`14`
PR	max pagerank value	`0.003`
C_d⁺	max in-degree centrality	`0.219`
C_d^-	max out-degree centrality	`0.015`
C_d	max degree centrality	`0.219`
α	powerlaw exponent, degree distribution	`3.416`
dmin_α	dmin for α	`26`
α⁺	powerlaw exponent, in-degree distribution	`2.681`
dmin_α⁺	dmin for α⁺	`18`
σ⁺	standard deviation, in-degree distribution	`79.906`
σ^-	standard deviation, out-degree distribution	`12.435`
cv⁺	coefficient variation, in-degree distribution	`2,080.27`
cv^- Effective measure!Score: `0.064` Datasets in this domain can be very well described by means of this particular measure.	coefficient variation, out-degree distribution	`323.734`
σ²⁺	variance, in-degree distribution	`6,385.053`
σ^2-	variance, out-degree distribution	`154.632`
C⁺_d	graph centralization	`0.219`
z^- Effective measure!Score: `0.059` Datasets in this domain can be very well described by means of this particular measure.	mean out-degree	`17.504`
$d e g^{- -} (G)$	max partial out-degree	`320`
$\overset{―}{d e g^{- -}} (G)$	mean partial out-degree	`1.946`
$d e g_{L}^{-} (G)$	max labelled out-degree	`16`
$\overset{―}{d e g_{L}^{-}} (G)$	mean labelled out-degree	`8.996`
$d e g_{D}^{-} (G)$	max direct out-degree	`324`
$\overset{―}{d e g_{D}^{-}} (G)$	mean direct out-degree	`8.262`
z⁺	mean in-degree	`4.006`
$d e g^{+ +} (G)$	max partial in-degree	`14,351`
$\overset{―}{d e g^{+ +}} (G)$	mean partial in-degree	`1.514`
$d e g_{L}^{+} (G)$	max labelled in-degree	`6`
$\overset{―}{d e g_{L}^{+}} (G)$	mean labelled in-degree	`2.645`
$d e g_{D}^{+} (G)$	max direct in-degree	`14,351`
$\overset{―}{d e g_{D}^{+}} (G)$ Effective measure!Score: `0.066` Datasets in this domain can be very well described by means of this particular measure.	mean direct in-degree	`1.891`
$d e g_{P} (G)$	max predicate degree	`48,038`
$\overset{―}{d e g_{P}} (G)$	mean predicate degree	`15,712.25`
$d e g_{P}^{+} (G)$	max predicate in-degree	`14,362`
$\overset{―}{d e g_{P}^{+}} (G)$	mean predicate in-degree	`8,074.688`
$d e g_{P}^{-} (G)$	max predicate out-degree	`28,007`
$\overset{―}{d e g_{P}^{-}} (G)$	mean predicate out-degree	`10,375.125`
$\propto_{s - o} (G)$	subject-object ratio	`0.178`
$r_{L} (G)$	ratio of repreated predicate lists	`0.312`
$d e g_{P L} (G)$	max predicate list degree	`2,402`
$\overset{―}{d e g_{P L}} (G)$ Effective measure!Score: `0.224` Datasets in this domain can be very well described by means of this particular measure.	mean predicate list degree	`1.453`
$C_{G}$ Effective measure!Score: `0.046` Datasets in this domain can be very well described by means of this particular measure.	distinct classes	`3`
$S_{G}^{C}$	all different typed subjects	`14,362`
$r_{T} (G)$	ratio of typed subjects	`1`

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