Working with interpreted values Leave feedback
Sometimes it’s not obvious what a particular metadata property is supposed to mean. A good example is a numeric flag or enumeration. For instance, here is the description of the EXIF ExposureProgram tag taken from the official EXIF specification:
NoteThe class of the program used by the camera to set exposure when the picture is taken. The tag values are as follows.
0 = Not defined
1 = Manual
2 = Normal program
3 = Aperture priority
4 = Shutter priority
5 = Creative program
6 = Action program
7 = Portrait mode
8 = Landscape mode
As you can see, all modes are represented by numeric values. If you are not familiar with the specification, converting these bare numbers to something meaningful is hard. This is where interpreted values come in — they provide a user-friendly description of the original property value.
To get a full list of properties that have interpreted values for a particular file, use the example below. The original value is available through prop.value.raw_value and the human-readable one through prop.interpreted_value.raw_value.
from groupdocs.metadata import Metadata
def working_with_interpreted_values():
with Metadata("input.jpg") as metadata:
# Keep only properties that expose a human-readable interpreted value
properties = metadata.find_properties(lambda p: p.interpreted_value is not None)
for prop in properties:
print(prop.name)
print(prop.value.raw_value) # original (raw) value
print(prop.interpreted_value.raw_value) # friendly interpretation
print()
if __name__ == "__main__":
working_with_interpreted_values()
input.jpg is the sample file used in this example. Click here to download it.
FileFormat
9
Jpeg
ByteOrder
1
BigEndian
XResolution
System.Double[]
[TRUNCATED]
From release to release we add interpreters to metadata properties extracted from various formats.
You may easily run the code above and see the feature in action in our GitHub examples:
You are welcome to view and edit metadata of PDF, DOC, DOCX, PPT, PPTX, XLS, XLSX, emails, images and more with our free online Free Online Document Metadata Viewing and Editing App.
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