3 Basics | 21
"Multirate file formats (DXL and INCA dialect)" below
"Single rate file formats" below
Multirate file formats (DXL and INCA dialect)
DXL (ASCII Multi Rate V4.0)
The advantage of a multirate file format is that it contains only real data, i.e. only
data that has actually been recorded, and no interpolated data. The first column
contains all recorded timestamps (combined from all available measured rasters).
The second column contains all recorded timestamps for a specific raster, e.g.
100 ms. The next columns show signal specific recorded values. The values cor-
respond to the timestamps in the second column. If no value has been recorded
for a signal at a specific timestamp, an empty cell is shown.
Two DXL formats are supported by V8.6. These differ in the handling of enu-
meration signals. In DXL format (ASCII Multi-Rate V4.0) the verbal strings are
stored in the file. The format DXL INCA dialect corresponds to the format created
in INCA as ETASGroupAscii (ASCII (Multirate-Write only). In this
format, for enumerations their numerical values are stored, more precisely their
decimal values before the verbal conversion has been applied.
Single rate file formats
In contrast to multirate file formats, all single rate file formats allow to have one
time channel only, which can be a merged time channel (based on all time stamps
from all rates) or, optionally, defined by an equidistant rate. As a consequence,
such files contain typically (constantly) interpolated data.
V8.6 provides an interface to define such file formats. The delivery of MDA
includes already some file formats.
TSV
TSV stands for "Tab-separated values". It is reduced to the minimum. The
first row contains pure signal names, any following row item stamp and the
corresponding values.
CSV recorded with Portable Emission Measurement Systems (PEMS)
CVS stands for "Comma-separated values". Ideally, this should be a CSV
file according to Real Driving Emissions (RDE) standard for data exchange
format of PEMS.
DIA
DIA stands for "Diagra File format". Besides signal names and data also
units are given.
To define a specific ASCII-based textual format, do the following:
MDA V8 | User Guide
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