scribl

A system for the semantic capture of relationships in biological literature

Amber Biology LLC

The scribl language was designed for the curation from scientific articles, of the relationships between the various biological agents and processes that they describe, with a view to generating a graph database that captures these relationships as a connected network.

scribl statements are added as tags to articles in a literature database (the scribl codebase currently supports the free, open-source Zotero database). These tags are parsed and used to create a graph data structure that can be then be exported for use in a graph database platform such as neo4j, or Python's NetworkX.

For example:

::agent c9orf72 :gene :protein :url https://www.uniprot.org/uniprot/Q96LT7
::agent gtp :tag nucleoside, purine, nucleoside triphosphate
::process exportin releases cargo into cytoplasm @ exportin-1
::process smcr8 mutation > ulk1 phosphorylation < autophagy = smcr8 expression

Full details of the language are available in the scribl.pdf document.

Quickstart install and test

We recommend installing in a virtual environment.

Install from PyPI (not yet available)

pip install scribl

Install via GitHub repo

git clone https://github.com/amberbiology/scribl.git
cd scribl
pip install .

This will pull in all relevant Python dependencies, including pyparsing, pyzotero and others within your virtual environment

Test your installation

When scribl is installed, it contains a command-line program scribl that can perform some common API tasks, and to help the user jumpstart exploring using the system. After installation here are two example command-line you can cut-and-paste and run from the terminal to check installation:

Check version

scribl --version

Check outputs

First create a new, empty directory and change into it, e.g.:

mkdir /tmp/scribl-test
cd /tmp/scribl-test

Then run:

scribl -g new_graphdb --zotero-library 5251557:group --networkx-fig graphdb-visual.png --graphmlfile graphdb.xml --cyphertextfile graphdb.cypher

This will read from a public Zotero group collection we have created (ID 5251557) for testing purposes, that includes citations with scribl tags. This example run generates the following outputs:

• new_graphdb - directory containing the new scribl database

• graphdb.cypher - a plain text file in the Cypher query language

• graphdb.xml - an XML file in GraphML format

• graphdb-visual.png - a visualization of the GraphML graph in PNG format:

  

  see below for a more detailed description of visualization options.

Visualization of the scribl database

As mentioned previously, a scribl database can be exported for use in a graph database platform for further interactive exploration. One of the most developed graph visualization platforms is as Neo4j which reads the output in Cypher query language . Unfortunately Neo4j isn't directly available via Python packaging system. The instructions for installation and configuration is beyond the scope of this documentation, but they are available for most platforms. The main scribl documentation describes how to take the exported Cypher text generated by a command like the above into Neo4j and dynamically update the Neo4j database.

In the interests getting up and running quickly with visualizations, but staying purely within the Python ecosystem, scribl also supports outputs other than Cypher. The above mentioned GraphML backend generates visualizations using a combination of NetworkX and matplotlib. This feature enables generation of static visualizations of the current scribl database. Visualizations generated via the GraphML/NetworkX are best suited for small networks and to get a feel for the scribl database structure with a minimum of fuss. For "production" level visualization as well as interactive analyses, however, you are likely to want to try Neo4j.

Examples of scribl command-line program

Here are some common scribl tasks you can do using the scribl command-line:

Create a new database from Zotero library

scribl -g new_graphdb --zotero-library <LIBRARY_ID>:<TYPE> --zotero-api-key <API_KEY>

A scribl database is created in current directory with the name new_graphdb using the Zotero LIBRARY_ID with specified TYPE (either user or group). An API_KEY is only needed in the case of accessing private libraries, or non-public group libraries. The pyzotero library has documentation on how to find out your library ID and creating an API key.

Create a new database from a local Zotero CSV file

scribl -g new_graphdb --zoterofile <ZOTERO_CSV>

This populates the database from a local CSV file ZOTERO_CSV exported from a Zotero library. Note that the above two commands, just create (or read from an existing) database, but generate no output. (Note that the new_graphdb database is not overwritten if it already exists, unless the --overwrite flag is also supplied)

To generate outputs, there are a number of options. All assume at least one Zotero database has been imported, either from a local CSV file, or via the Zotero library API (i.e. at least one of the import steps above have been run at least once). Outputs will be skipped if the database empty.

Output representation of graph in GraphML format

scribl -g new_graphdb --graphmlfile <OUTPUT_XML>

This generates output in GraphML XML format (e.g. OUTPUT_XML should be supplied with the appropriate extension, e.g. graphdb.xml).

Output a NetworkX visualization

scribl -g new_graphdb --networkx-fig <OUTPUT_IMAGE>

This generates and saves the visualization as as one of the matplotlib supported OUTPUT_IMAGE formts, using data from current scribl database (for example, using graphdb-visual.pdf would generate it in PDF format). The visualizations are produced from GraphML XML output that is rendered using Python's NetworkX library.

Output representation of graph as a Cypher file

scribl -g new_graphdb --cyphertextfile <OUTPUT_CYPHER>

The above outputs a Cypher text representation of the database in the file OUTPUT_CYPHER, as a plain text file in the previously mentioned Cypher query language, suitable for import into Neo4J.

For a full description of all command-line arguments, run:

scribl --help

Using the scribl API directly in your programs

You can write your own Python program using the API directly. For example, the code below, generates the same outputs as the check outputs example above. It creates a new database, populates it from the same remote Zotero library, and then generates graphdb.xml (GraphML), graphdb.cypher (Cypher) and graphdb-visual.png (PNG).

from scribl.manage_graphdb import GraphDBInstance

gdb = GraphDBInstance("newgraph_db")
gdb.set_metadata("Test Scribl DB", "User name", "Small test")
gdb.import_zotero_library(5251557, "group")
gdb.load_zotero_csv()
gdb.export_graphml_text(filepath="graphdb.xml")
gdb.export_graphml_figure(filepath="graphdb-visual.png")
gdb.export_cypher_text(filepath="graphdb.cypher")

The code for the scribl command contains more examples of use of the API. In addition, more details can be found in the main documentation.

Contributing to scribl

Read our CONTRIBUTING guide.

Copyright and license

scribl is Copyright (C) 2023. Amber Biology LLC

scribl is distributed under the terms of AGPL-3.0 license

Acknowledgements

The development of the scribl platform was made possible by the funding and expertise provided by the Association for Frontotemporal Degeneration (AFTD - https://www.theaftd.org/) whose mission is to improve the quality of life of people affected by Frontotemporal Degeneration and drive research to a cure. We are particularly grateful to AFTD leadership team members Debra Niehoff and Penny Dacks for their invaluable direction and guidance, and for getting us access to leading researchers in the field of neurodegenerative disease - all of whose insights and advice were pivotal in the development of this free, open-source research tool.