Authoring Biocompute Objects with R: A Case Study

In biocompute: Create and Manipulate BioCompute Objects

knitr::opts_chunk$set(comment = "")

In this vignette, we will use the biocompute package to recreate the example Biocompute Object (HCV1a.json) used in the BCO specification.

library("biocompute")

Provenance domain

name <- "HCV1a ledipasvir resistance SNP detection"
version <- "1.0.0"
review <- data.frame(
  "status" = c("approved", "approved"),
  "reviewer_comment" = c("Approved by [company name] staff. Waiting for approval from FDA Reviewer", "The revised BCO looks fine"),
  "date" = c(
    as.POSIXct("2017-11-12T12:30:48", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-12-12T12:30:48", format = "%Y-%m-%dT%H:%M:%S", tz = "America/Los_Angeles")
  ),
  "reviewer_name" = c("Jane Doe", "John Doe"),
  "reviewer_affiliation" = c("Seven Bridges Genomics", "U.S. Food and Drug Administration"),
  "reviewer_email" = c("[e-mail]", "[e-mail]"),
  "reviewer_contribution" = c("curatedBy", "curatedBy"),
  "reviewer_orcid" = c("https://orcid.org/0000-0000-0000-0000", NA),
  stringsAsFactors = FALSE
)

derived_from <- "https://github.com/biocompute-objects/BCO_Specification/blob/1.2.1-beta/HCV1a.json"
obsolete_after <- as.POSIXct("2018-11-12T12:30:48", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")

embargo <- c(
  "start_time" = as.POSIXct("2017-10-12T12:30:48", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
  "end_time" = as.POSIXct("2017-11-12T12:30:48", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
)

created <- as.POSIXct("2017-01-20T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")

modified <- as.POSIXct("2019-05-10T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")

contributors <- data.frame(
  "name" = c("Jane Doe", "John Doe"),
  "affiliation" = c("Seven Bridges Genomics", "U.S. Food and Drug Administration"),
  "email" = c("[e-mail]", "[e-mail]"),
  "contribution" = I(list(c("createdBy", "curatedBy"), c("authoredBy"))),
  "orcid" = c("https://orcid.org/0000-0000-0000-0000", NA),
  stringsAsFactors = FALSE
)

license <- "https://creativecommons.org/licenses/by/4.0/"

provenance <- compose_provenance(
  name, version, review, derived_from, obsolete_after,
  embargo, created, modified, contributors, license
)
provenance %>% convert_json()

Usability Domain

text <- c(
  "Identify baseline single nucleotide polymorphisms (SNPs)[SO:0000694], (insertions)[SO:0000667], and (deletions)[SO:0000045] that correlate with reduced (ledipasvir)[pubchem.compound:67505836] antiviral drug efficacy in (Hepatitis C virus subtype 1)[taxonomy:31646]",
  "Identify treatment emergent amino acid (substitutions)[SO:1000002] that correlate with antiviral drug treatment failure",
  "Determine whether the treatment emergent amino acid (substitutions)[SO:1000002] identified correlate with treatment failure involving other drugs against the same virus"
)

usability <- compose_usability(text)
usability %>% convert_json()

Extension domain

FHIR extension

fhir_endpoint <- "https://fhirtest.uhn.ca/baseDstu3"
fhir_version <- "3"
fhir_resources <- data.frame(
  "id" = c("21376", "6288583", "25544", "92440", "4588936"),
  "resource" = c(
    "Sequence", "DiagnosticReport", "ProcedureRequest",
    "Observation", "FamilyMemberHistory"
  ),
  stringsAsFactors = FALSE
)

fhir <- compose_fhir(fhir_endpoint, fhir_version, fhir_resources)
fhir %>% convert_json()

SCM extension

scm_repository <- "https://github.com/example/repo1"
scm_type <- "git"
scm_commit <- "c9ffea0b60fa3bcf8e138af7c99ca141a6b8fb21"
scm_path <- "workflow/hive-viral-mutation-detection.cwl"
scm_preview <- "https://github.com/example/repo1/blob/c9ffea0b60fa3bcf8e138af7c99ca141a6b8fb21/workflow/hive-viral-mutation-detection.cwl"

scm <- compose_scm(scm_repository, scm_type, scm_commit, scm_path, scm_preview)
scm %>% convert_json()

extension <- compose_extension(fhir, scm)
extension %>% convert_json()

Description domain

keywords <- c("HCV1a", "Ledipasvir", "antiviral resistance", "SNP", "amino acid substitutions")
xref <- data.frame(
  "namespace" = c("pubchem.compound", "pubmed", "so", "taxonomy"),
  "name" = c("PubChem-compound", "PubMed", "Sequence Ontology", "Taxonomy"),
  "ids" = I(list(
    "67505836",
    "26508693",
    c("SO:000002", "SO:0000694", "SO:0000667", "SO:0000045"),
    "31646"
  )),
  "access_time" = c(
    as.POSIXct("2017-01-20T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-21T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-22T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-23T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  stringsAsFactors = FALSE
)

platform <- "Seven Bridges Platform"

pipeline_meta <- data.frame(
  "step_number" = c("1"),
  "name" = c("HIVE-hexagon"),
  "description" = c("Alignment of reads to a set of references"),
  "version" = c("1.3"),
  stringsAsFactors = FALSE
)

pipeline_prerequisite <- data.frame(
  "step_number" = rep("1", 5),
  "name" = c(
    "Hepatitis C virus genotype 1",
    "Hepatitis C virus type 1b complete genome",
    "Hepatitis C virus (isolate JFH-1) genomic RNA",
    "Hepatitis C virus clone J8CF, complete genome",
    "Hepatitis C virus S52 polyprotein gene"
  ),
  "uri" = c(
    "https://www.ncbi.nlm.nih.gov/nuccore/22129792",
    "https://www.ncbi.nlm.nih.gov/nuccore/5420376",
    "https://www.ncbi.nlm.nih.gov/nuccore/13122261",
    "https://www.ncbi.nlm.nih.gov/nuccore/386646758",
    "https://www.ncbi.nlm.nih.gov/nuccore/295311559"
  ),
  "access_time" = c(
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  stringsAsFactors = FALSE
)

pipeline_input <- data.frame(
  "step_number" = rep("1", 2),
  "uri" = c(
    "https://example.com/dna.cgi?cmd=objFile&ids=514683",
    "https://example.com/dna.cgi?cmd=objFile&ids=514682"
  ),
  "access_time" = c(
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  stringsAsFactors = FALSE
)

pipeline_output <- data.frame(
  "step_number" = rep("1", 2),
  "uri" = c(
    "https://example.com/data/514769/allCount-aligned.csv",
    "https://example.com/data/514801/SNPProfile*.csv"
  ),
  "access_time" = c(
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  stringsAsFactors = FALSE
)

description <- compose_description(
  keywords, xref, platform,
  pipeline_meta, pipeline_prerequisite, pipeline_input, pipeline_output
)
description %>% convert_json()

Execution domain

script <- "https://example.com/workflows/antiviral_resistance_detection_hive.py"
script_driver <- "shell"
software_prerequisites <- data.frame(
  "name" = c("HIVE-hexagon", "HIVE-heptagon"),
  "version" = c("babajanian.1", "albinoni.2"),
  "uri" = c(
    "https://example.com/dna.cgi?cmd=dna-hexagon&cmdMode=-",
    "https://example.com/dna.cgi?cmd=dna-heptagon&cmdMode=-"
  ),
  "access_time" = c(
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  "sha1_chksum" = c("d60f506cddac09e9e816531e7905ca1ca6641e3c", NA),
  stringsAsFactors = FALSE
)
external_data_endpoints <- data.frame(
  "name" = c("generic name", "access to ftp server", "access to e-utils web service"),
  "url" = c(
    "protocol://domain:port/application/path",
    "ftp://data.example.com:21/",
    "https://eutils.ncbi.nlm.nih.gov/entrez/eutils"
  ),
  stringsAsFactors = FALSE
)
environment_variables <- data.frame(
  "key" = c("HOSTTYPE", "EDITOR"),
  "value" = c("x86_64-linux", "vim")
)

execution <- compose_execution(
  script, script_driver, software_prerequisites, external_data_endpoints, environment_variables
)
execution %>% convert_json()

Parametric domain

df_parametric <- data.frame(
  "param" = c(
    "seed", "minimum_match_len",
    "divergence_threshold_percent",
    "minimum_coverage", "freq_cutoff"
  ),
  "value" = c("14", "66", "0.30", "15", "0.10"),
  "step" = c(1, 1, 1, 2, 2),
  stringsAsFactors = FALSE
)

parametric <- compose_parametric(df_parametric)
parametric %>% convert_json()

I/O domain

input_subdomain <- data.frame(
  "filename" = c(
    "Hepatitis C virus genotype 1",
    "Hepatitis C virus type 1b complete genome"
  ),
  "uri" = c(
    "https://www.ncbi.nlm.nih.gov/nuccore/22129792",
    "https://www.ncbi.nlm.nih.gov/nuccore/5420376"
  ),
  "access_time" = c(
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  stringsAsFactors = FALSE
)

output_subdomain <- data.frame(
  "mediatype" = c("text/csv", "text/csv"),
  "uri" = c(
    "https://example.com/data/514769/dnaAccessionBased.csv",
    "https://example.com/data/514801/SNPProfile*.csv"
  ),
  "access_time" = c(
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST"),
    as.POSIXct("2017-01-24T09:40:17", format = "%Y-%m-%dT%H:%M:%S", tz = "EST")
  ),
  stringsAsFactors = FALSE
)

io <- compose_io(input_subdomain, output_subdomain)
io %>% convert_json()

Error domain

empirical <- data.frame(
  "key" = c("false_negative_alignment_hits", "false_discovery"),
  "value" = c("<0.0010", "<0.05"),
  stringsAsFactors = FALSE
)

algorithmic <- data.frame(
  "key" = c("false_positive_mutation_calls", "false_discovery"),
  "value" = c("<0.00005", "0.005"),
  stringsAsFactors = FALSE
)

error <- compose_error(empirical, algorithmic)
error %>% convert_json()

Top level fields

tlf <- compose_tlf(
  provenance, usability, extension, description,
  execution, parametric, io, error
)
tlf %>% convert_json()

Complete BCO

bco <- biocompute::compose(
  tlf, provenance, usability, extension, description,
  execution, parametric, io, error
)
bco %>% convert_json()

biocompute documentation built on May 3, 2022, 9:08 a.m.