Table of Contents

I. Current Data File Format

abeliangroup - An abelian group

angles - An angle structure list packet

anon - A collection of anonymous packets

anonref - Moves an anonymous packet into the packet tree

attachment - An arbitrary file attachment

code - An arbitrary amount of Python code

compact - Is a normal surface/hypersurface compact?

components - The components of a knot/link diagram

compressingdisc - Does a triangulation contain a compressing disc?

connected - Is a normal surface connected?

connections - The connections between crossings in a knot/link diagram

container - A container packet

crossings - The individual crossings in a knot/link diagram

euler - The Euler characteristic of a normal surface

filtercomb - A logical combination surface filter

filterprop - A surface filter that uses basic properties

filtertrivial - A trivial surface filter

fundgroup - The fundamental group of a triangulation

group - A group presentation

H1 - The first homology group of a triangulation

H1Bdry - The first homology group of the boundary of a triangulation

H1Rel - The relative first homology group of a triangulation

H2 - The second homology group of a triangulation

haken - Does a triangulation represent a Haken 3-manifold?

handlebody - Does a triangulation represent an orientable handlebody?

hypersurface - A single normal hypersurface in a 4-manifold triangulation

hypersurfaces - A normal hypersurface list packet

irreducible - Does a triangulation represent an irreducible 3-manifold?

link - A knot/link packet

orbl - Is a normal surface orientable?

realbdry - Does a normal surface/hypersurface have real boundary?

regina - An entire Regina data file

reln - A relation in a group presentation

script - A script packet

simplex - A single top-dimensional simplex in a dim-dimensional triangulation

snappeadata - A SnapPea triangulation packet

spanstrict - Does an angle structure list span a strict structure?

spantaut - Does an angle structure list span a taut structure?

splitsfce - Does a triangulation have a splitting surface?

struct - A single angle structure

surface - A single normal surface in a 3-manifold triangulation

surfaces - A normal surface list packet

tag - A user-assigned packet tag

textdata - A text packet

threesphere - Does a triangulation represent the 3-sphere?

tri - A triangulation packet

twosided - Is a normal surface two-sided?

txi - Does a triangulation represent the product of the torus with an interval?

var - A single script variable

zeroeff - Is a triangulation 0-efficient?

II. Deprecated and Removed Elements

allowstrict - Replaced by spanstrict

allowtaut - Replaced by spantaut

angleparams - Replaced by attributes of angles

compact (filter) - Replaced by attributes of filterprop

euler (filter) - Replaced by attributes of filterprop

filter - Replaced by different elements for different filter types

filter (combination) - Replaced by filtercomb

filter (properties) - Replaced by filterprop

flags - No longer stored

line - Replaced by code

op - Replaced by attributes of filtercomb

orbl (filter) - Replaced by attributes of filterprop

packet - Replaced by different elements for different packet types

packet (2-dimensional triangulation) - Replaced by tri

packet (3-dimensional triangulation) - Replaced by tri

packet (4-dimensional triangulation) - Replaced by tri

packet (dim-dimensional triangulation) - Replaced by tri

packet (angle structure list) - Replaced by angles

packet (container) - Replaced by container

packet (link) - Replaced by link

packet (normal hypersurface list) - Replaced by hypersurfaces

packet (normal surface list) - Replaced by surfaces

packet (PDF) - Replaced by attachment

packet (script) - Replaced by script

packet (SnapPea triangulation) - Replaced by snappeadata

packet (surface filter) - Replaced by filtercomb, filterprop and filtertrivial

packet (text) - Replaced by textdata

params - Replaced by attributes of surfaces and hypersurfaces

pent - Replaced by simplex

pentachora - Replaced by tri

pdf - Replaced by attachment

realbdry (filter) - Replaced by attributes of filterprop

reginadata - Replaced by regina

simplices - Replaced by tri

snappea - Replaced by snappeadata

solidtorus - Replaced by handlebody

tet - Replaced by simplex

tetrahedra - Replaced by tri

text - Replaced by textdata and code

threeball - Replaced by handlebody

triangle - Replaced by simplex

triangles - Replaced by tri

turaevviro - No longer stored