.TLP File Extension

File created by Tulip, an information visualization and analysis tool; contains graph definitions, such as the version of the format, the date, author name, and definitions of nodes, edges, clusters, and other properties.

The syntax of the TLP format version:
(tip "1.0"
; rest of the file
...
)

The syntax of additional file information:
(date | author | comments "a string")

The syntax of definition of nodes:
(nodes id_node1 id_node2 id_node3 id_node4...)

The syntax of definition of edges:
(edge id id_source id_target)

The syntax of definition of clusters:
(cluster id name
  (nodes id_node1 id_node2 id_node3 ...)
  (edges id_edge1 id_edge2 id_edge3 ...)
  (cluster id name
    (nodes id_node1 id_node2 id_node3 ...)
    (edges id_edge1 id_edge2 id_edge3 ...)
  )
)

The syntax of definition of properties:
(property cluster_id property_type "property_name"
  (default "default_node_value" "default_edge_value")
  (node id value)
  ...
  (edge id value)
  ...
)