The new JSON package allows import and export of files and strings in the JSON format, a popular format used by many modern applications for exchanging structured data.
Example: Import JSON data encoding the mailing address of Maplesoft headquarters.

$\mathrm{currentdir}\left(\mathrm{FileTools}:-\mathrm{JoinPath}\left(\left[''example''\right]\, \mathrm{base}\=\mathrm{datadir}\right)\right)\:$

$T ≔ \mathrm{JSON}:-\mathrm{ParseFile}\left(''address.json''\right)$

$T\left[''companyName''\right]$

$T\left[''address''\right]\left[''city''\right]\, T\left[''address''\right]\left[''country''\right]$

The KML file format and the related KMZ compressed format are popular XML-based map data formats which are used by many mapping applications.

KML permits geographic areas and contours to be defined using line and polygon primitives.

The new Import command, described in more detail below, can import a KML map file and represent it as a 2-D plot.
In addition to KML and KMZ, Import also supports the GPX and SHP cartographical formats.

Example: Import a four-colour KMZ map of the 48 contiguous states of the United States of America.

$\mathrm{Import}\left(''http://www.maplesoft.com/data/examples/kmz/CONUS.kmz''\, \mathrm{title} \= ''The\; Contiguous\; United\; States''\, \mathrm{titlefont} \= \left[\mathrm{Times}\, \mathrm{Bold}\, 20\right]\, \mathrm{size} \= \left[800\, 400\right]\right)$

The Import and Export commands also support three popular text-based formats for representing DNA and protein sequences: FASTA, FASTQ, and GenBank.
You can import genetic or proteinomic data into your session and use text processing tools to analyze the imported sequence.

Example: Import a DNA sequence from a FASTA file.

$\mathrm{mtDNASequence}≔\mathrm{Import}\left(''humanmtDNA.fasta''\right)\:$

Study the metadata for the first sequence in the file:

$\mathrm{mtDNASequence}\left[1\,1\right]$

Examine the nucleotide codes at positions 16200 through 16250:

$\mathrm{mtDNASequence}\left[1\,2\right]\left[16200..16250\right]$

Count the frequency of each of nucleotide base (A, C, G, or T) in the sequence:

  $\mathrm{frequencies} ≔ \left[\mathrm{StringTools}:-\mathrm{CharacterFrequencies}\left(\mathrm{mtDNASequence}\left[1\,2\right]\right)\right]$

$\mathrm{Statistics}:-\mathrm{ColumnGraph}\left( \mathrm{frequencies}\right)$

The GraphTheory package now supports six new formats for import and export: DGML , Graphlet , GraphML , GXL , Pajek , and TGF.
For more information on supported graph-theoretic formats, see Formats.