diff --git a/src/test/scala/inputData.scala b/src/test/scala/inputData.scala
new file mode 100644
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+++ b/src/test/scala/inputData.scala
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+/*
+  # Input data
+
+  Here we find methods for downloading input data from their original locations.
+*/
+package bio4j.data.titan.test
+
+import java.io.File
+import sys.process._
+
+/*
+  These classes could be part of bio4j/bio4j-data-import
+*/
+case class UniProtSwissProtData(
+  swissProtXML      : File,
+  keywordsTSV       : File,
+  isoformSequences  : File
+)
+
+case class UniProtTrEMLData(
+  trEMBLXML: File
+)
+
+case class UniRefData(
+  uniref100ClustersXML  : File,
+  uniref90ClustersXML   : File,
+  uniref50ClustersXML   : File
+)
+
+case class NCBITaxonomyData(
+  nodes: File,
+  names: File
+)
+
+case class GeneOntologyData(
+  oboXMLFilteredOntology: File
+)
+
+case class EnzymeData(
+  entries: File,
+  classes: File
+)
+
+/*
+  ### Download data
+
+  URLs, scripts for extracting files etc.
+*/
+// name ="2016_08", for examle.
+case class UniProtRelease(val name: String) {
+
+  lazy val baseFolder: String =
+    s"ftp://ftp.uniprot.org/pub/databases/uniprot/previous_releases/release-${name}"
+
+  lazy val swissProtWholeThingGzipped: String =
+    s"${baseFolder}/knowledgebase/uniprot_sprot-only${name}.tar.gz"
+
+  // TODO this requires a manual download, and putting it somewhere in S3
+  lazy val keywords: String =
+    ???
+
+  lazy val isoformsSequences: String =
+    "uniprot_sprot_varsplic.fasta.gz"
+
+  lazy val isoformsSequencesGzipped: String =
+    s"${isoformsSequences}.gz"
+
+  // this is more a reminder than a working implementation
+  def extractUnder(folder: File): UniProtSwissProtData = {
+
+    // TODO proper file management
+    val swissProtFileTGz      = s"${folder}/uniprot_sprot-only${name}.tar.gz"
+
+    val swissProtXMLFile      = new File(s"${folder}/uniprot_sprot.xml")
+    val keywordsTSVFile       = new File(s"${folder}/keywords-all.tsv")
+    val isoformsSequencesFile = new File(s"${folder}/uniprot_sprot_varsplic.fasta")
+
+    // download keywords
+    Seq("wget", keywords, "-O", s"${keywordsTSVFile}").!
+    // download SwissProt from FTP
+    Seq("wget", swissProtWholeThingGzipped, "-O", swissProtFileTGz).!
+    // extract
+    Seq("tar", "-xvzf", swissProtFileTGz).!
+    // extract individual files
+    // SwissProt xml
+    Seq("gzip", "-d", s"${folder}/uniprot_sprot.xml.gz").!
+    // isoform sequences
+    Seq("gzip", "-d", s"${folder}/uniprot_sprot_varsplic.fasta").!
+
+    UniProtSwissProtData(
+      swissProtXML      = swissProtXMLFile,
+      keywordsTSV       = keywordsTSVFile,
+      isoformSequences  = isoformsSequencesFile
+    )
+  }
+}
+
+case class UniProtTrEMBLRelease(val name: String) {
+
+  lazy val baseFolder: String =
+    s"ftp://ftp.uniprot.org/pub/databases/uniprot/previous_releases/release-${name}"
+
+  lazy val trEMBLGzipped: String =
+    s"${baseFolder}/knowledgebase/knowledgebase${name}.tar.gz"
+
+  def extractUnder(folder: File): UniProtTrEMLData = {
+
+    val trEMBLGzippedFile = s"${folder}/knowledgebase${name}.tar.gz"
+
+    // download TrEMBL from FTP
+    Seq("wget", trEMBLGzipped, "-O", s"${trEMBLGzippedFile}").!
+    // extract
+    Seq("tar", "-xvzf", s"${trEMBLGzippedFile}").!
+
+    // TODO file name
+    UniProtTrEMLData(
+      trEMBLXML = ???
+    )
+  }
+}
+
+case class UniRefRelease(val name: String) {
+
+  lazy val baseFolder: String =
+    s"ftp://ftp.uniprot.org/pub/databases/uniprot/previous_releases/release-${name}"
+
+  lazy val uniRefGzipped: String =
+    s"${baseFolder}/uniref/uniref${name}.tar.gz"
+
+  def extractUnder(folder: File): UniRefData =
+    ???
+}
+/*
+  **NOTE** the NCBI taxonomy has no notion of versioning or whatever.
+*/
+case class NCBITaxonomyRelease(val name: String) {
+
+  // see ftp://ftp.ncbi.nih.gov/pub/taxonomy/taxdump_readme.txt
+  lazy val everythingGzipped: String =
+    "ftp://ftp.ncbi.nih.gov/pub/taxonomy/taxdump.tar.gz"
+
+  def extractUnder(folder: File): NCBITaxonomyData =
+    ???
+}
+
+case class GeneOntologyRelease(val name: String) {
+
+  // there are daily automated builds here: http://archive.geneontology.org/termdb/
+  lazy val termdbGzipped: String =
+    "http://archive.geneontology.org/latest-full/go_monthly-termdb.obo-xml.gz"
+}
+
+case class ENZYMERelease() {
+
+  lazy val entries: String =
+    "ftp://ftp.expasy.org/databases/enzyme/release/release_with_updates/release/enzyme.dat"
+
+  lazy val classes: String =
+    "ftp://ftp.expasy.org/databases/enzyme/release/release_with_updates/release/enzclass.txt"
+}