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*To*: ba-ohs-talk@bootstrap.org*From*: Simon Buckingham Shum <S.Buckingham.Shum@open.ac.uk>*Date*: Wed, 17 Apr 2002 10:18:43 +0000*Message-id*: <a05101509b8e2fa44d7bc@[137.108.25.3]>

Title:

Joslyn, Cliff: (2000)"Hypergraph-Based Representations for Portable Knowledge Management Environments",

LANL Technical Report LAUR 00-5660, 2000.

ftp://wwwc3.lanl.gov/pub/users/joslyn/kenv1.pdf

Joslyn is thinking along v. similar lines to us, essentially
arguing for weighted conceptual graphs as the fundamental underlying
representation for a "DKS" (Distributed Knowledge System), that can be
rendered in multiple ways (cf. Eugene's paper)

Conjecture 6: Each
semantic hyperweb determines a unique conceptual graph. Conversely,
each

conceptual graph determines a class of semantic hyperwebs equivalent to weights.

conceptual graph determines a class of semantic hyperwebs equivalent to weights.

The conjecture
basically states that a cg is equivalent to an unweighted semantic
hyperweb.

[...]

The issues where we
part company with cgs include:

Semantic webs are
weighted structures.

The bipartate representation of a cg echoes the \tentacle" representation of a hypergraph.

The bipartate representation of a cg echoes the \tentacle" representation of a hypergraph.

The difference is
that all the tentacles together comprise a single hyperedge, whereas
in the

bipartate graph
these have to be called out distinctly.

Similarly, hypergraphs are closer to the typed-link hypertext model. Here now only concepts

Similarly, hypergraphs are closer to the typed-link hypertext model. Here now only concepts

are represented as
vertices, and relations of different types are assigned edges of
different

types (labels),
resulting in a labeled or multigraph mathematical
structure.

He also refers to work that connects with the graph tool reqts
discussion here:

3.1 Front
End

First, there is a
need for a general, robust front end, not something highly specialized
like the Java

Ontology Editor (JOE) [22], or Protege [42]. The following features are desired:

Ontology Editor (JOE) [22], or Protege [42]. The following features are desired:

A full
drawing/visualization environment for both simpler node-arc diagrams
and more com-

plex hypergraph form.

Rubberbanding

A professional GUI: full undo/redo, a full audit trail (time stamping, authoring, versioning),

graphical and textual annotation, etc.

Building on commercial platforms for graph editing and on supported protocols both at the

intersection of graph markup and KR.

plex hypergraph form.

Rubberbanding

A professional GUI: full undo/redo, a full audit trail (time stamping, authoring, versioning),

graphical and textual annotation, etc.

Building on commercial platforms for graph editing and on supported protocols both at the

intersection of graph markup and KR.

Recent work at LANL
collaboratively with the University of Liverpool has begun
development

building from the Visio platform for Windows. Visio is a superb environment for working with

reasonably sized labeled graphs, and can be adapted to the tentacle representation of hypergraphs

and cgs.

building from the Visio platform for Windows. Visio is a superb environment for working with

reasonably sized labeled graphs, and can be adapted to the tentacle representation of hypergraphs

and cgs.

**References**:**[ba-ohs-talk] new version of graph model paper posted***From:*Eugene Eric Kim <eekim@eekim.com>

**Re: [ba-ohs-talk] new version of graph model paper posted***From:*Eric Armstrong <eric.armstrong@sun.com>

**Re: [ba-ohs-talk] new version of graph model paper posted***From:*Murray Altheim <m.altheim@open.ac.uk>

**Re: [ba-ohs-talk] new version of graph model paper posted***From:*Eric Armstrong <eric.armstrong@sun.com>

**Re: [ba-ohs-talk] new version of graph model paper posted***From:*Murray Altheim <m.altheim@open.ac.uk>

**Re: [ba-ohs-talk] new version of graph model paper posted***From:*Simon Buckingham Shum <S.Buckingham.Shum@open.ac.uk>

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