# \#metadata

**URL:** https://discourse.julialang.org/tag/metadata/201.md

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## [DataFrames.jl: metadata](https://discourse.julialang.org/t/dataframes-jl-metadata/84544)

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**Author:** [@bkamins](https://discourse.julialang.org/u/bkamins)\
**Replies:** 148\
**Last updated:** [April 24, 2023, 9:01am UTC](https://discourse.julialang.org/t/dataframes-jl-metadata/84544 "2023-04-24T09:01:37Z")

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The discussion on metadata in DataFrames.jl has started 10 years ago, see this issue. In DataFrames.jl we decided to finally settle the issue. The relevant PR is here. The fact that metadata issue has been open for 10 …

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## [Read data file and create a dictionary from the metadata](https://discourse.julialang.org/t/read-data-file-and-create-a-dictionary-from-the-metadata/97200)

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**Author:** [@Austin\_Weber](https://discourse.julialang.org/u/Austin_Weber)\
**Replies:** 14\
**Last updated:** [April 8, 2023, 4:09pm UTC](https://discourse.julialang.org/t/read-data-file-and-create-a-dictionary-from-the-metadata/97200 "2023-04-08T16:09:59Z")

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I have a spectral data file in which the contents are stored like this: #FORMAT : EMSA #VERSION : 1.0 #TITLE : 2023-Apr-06 #NPOINTS : 4096 #NCOLUMNS : 1 #SPECTRUM : 0.00, 0.0 10.00, …

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## [How to read GraphML with node and vertex metadata](https://discourse.julialang.org/t/how-to-read-graphml-with-node-and-vertex-metadata/96770)

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**Author:** [@ArtHarg](https://discourse.julialang.org/u/ArtHarg)\
**Replies:** 2\
**Last updated:** [March 29, 2023, 12:54pm UTC](https://discourse.julialang.org/t/how-to-read-graphml-with-node-and-vertex-metadata/96770 "2023-03-29T12:54:54Z")

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Is there an efficient way to read a GraphML file and produce a MetaGraph? My use case: I have a file containing 210,157 vertices and 1,016,092 edges, all with metadata. I can succesfully read the graph using g = loadg…

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## [\[ANN\] Metadata.jl](https://discourse.julialang.org/t/ann-metadata-jl/49662)

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**Author:** [@Zach\_Christensen](https://discourse.julialang.org/u/Zach_Christensen)\
**Replies:** 4\
**Last updated:** [November 8, 2020, 10:59pm UTC](https://discourse.julialang.org/t/ann-metadata-jl/49662 "2020-11-08T22:59:08Z")

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Hi everyone, I’d like to announce the Metadata.jl. It attempts to provide a generic and common interface for attaching and extracting metadata. This is mostly done by assuming that metadata has Symbol keys. Metadata can…

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## [Understanding IR representation and argument values](https://discourse.julialang.org/t/understanding-ir-representation-and-argument-values/43863)

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**Author:** [@mespinosami](https://discourse.julialang.org/u/mespinosami)\
**Replies:** 0\
**Last updated:** [July 29, 2020, 9:32am UTC](https://discourse.julialang.org/t/understanding-ir-representation-and-argument-values/43863 "2020-07-29T09:32:51Z")

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I am trying to understand how the IR representation exactly works and its structure. More specifically, would like to know if it is possible to access the values of the arguments passed to a function through the IR. Say…

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## [What should be an argument of this function?](https://discourse.julialang.org/t/what-should-be-an-argument-of-this-function/39660)

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**Author:** [@wiktorkujawa](https://discourse.julialang.org/u/wiktorkujawa)\
**Replies:** 3\
**Last updated:** [May 18, 2020, 9:13am UTC](https://discourse.julialang.org/t/what-should-be-an-argument-of-this-function/39660 "2020-05-18T09:13:15Z")

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Here’e the code error. julia\> name(15) ERROR: MethodError: no method matching name(::Int64) Closest candidates are: name(::DataType) I tried also this: julia\> name(typeof(Int)) ERROR: MethodError: Cannot \`convert\` a…

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## [Running macros with expression as an argument](https://discourse.julialang.org/t/running-macros-with-expression-as-an-argument/39584)

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**Author:** [@wiktorkujawa](https://discourse.julialang.org/u/wiktorkujawa)\
**Replies:** 4\
**Last updated:** [May 16, 2020, 10:45pm UTC](https://discourse.julialang.org/t/running-macros-with-expression-as-an-argument/39584 "2020-05-16T22:45:36Z")

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I’ve got errors on “local first\_parameter”. If I try to mess something without any sense, sometimes I get error at “local arg1” line. macro howToRunThis(fun::Expr) local first\_parameter = fun.args\[1\] local name = fi…

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## [How to add metadata info to a DataFrame?](https://discourse.julialang.org/t/how-to-add-metadata-info-to-a-dataframe/11168)

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**Author:** [@gcalderone](https://discourse.julialang.org/u/gcalderone)\
**Replies:** 96\
**Last updated:** [October 26, 2019, 2:57am UTC](https://discourse.julialang.org/t/how-to-add-metadata-info-to-a-dataframe/11168 "2019-10-26T02:57:26Z")

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Storing both data and metadata in the same object or container is a very common approach in many research fields, and it has proven to be very successful in (for instance) astronomy where a few standards had been officia…

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## [METADATA vs Registry](https://discourse.julialang.org/t/metadata-vs-registry/21688)

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**Author:** [@OliverEvans96](https://discourse.julialang.org/u/OliverEvans96)\
**Replies:** 4\
**Last updated:** [March 11, 2019, 12:28am UTC](https://discourse.julialang.org/t/metadata-vs-registry/21688 "2019-03-11T00:28:36Z")

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Hi all, In the v0.6 documentation, there’s a section about maintaining a custom metadata repository. That section seems to have disappeared in the v1.0, and the Pkg.init command is not present in Pkg3. In the v1.1, this…

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## [A type for metadata?](https://discourse.julialang.org/t/a-type-for-metadata/10456)

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**Author:** [@kevbonham](https://discourse.julialang.org/u/kevbonham)\
**Replies:** 11\
**Last updated:** [August 17, 2018, 6:24pm UTC](https://discourse.julialang.org/t/a-type-for-metadata/10456 "2018-08-17T18:24:46Z")

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I’m routinely dealing with data + metadata, and I wanted to get some feedback on ideas for how to operationalize this. I’m a biologist, not a programmer, so it’s likely I’m overlooking some obvious solution. I’ll explain…

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## [Recent Metadata.jl PRs](https://discourse.julialang.org/t/recent-metadata-jl-prs/10309)

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**Author:** [@ccoffrin](https://discourse.julialang.org/u/ccoffrin)\
**Replies:** 1\
**Last updated:** [April 12, 2018, 9:43pm UTC](https://discourse.julialang.org/t/recent-metadata-jl-prs/10309 "2018-04-12T21:43:59Z")

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It seems like the Metadata PRs have not been merged in some time (about 5 days?), is there a freeze in progress?

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## [Tests on METADATA PRs](https://discourse.julialang.org/t/tests-on-metadata-prs/8022)

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**Author:** [@avik](https://discourse.julialang.org/u/avik)\
**Replies:** 4\
**Last updated:** [March 7, 2018, 5:31pm UTC](https://discourse.julialang.org/t/tests-on-metadata-prs/8022 "2018-03-07T17:31:02Z")

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So I thought I’ll document the tests we run on PRs to METADATA.jl, when you register new packages, or add new versions to existing packages. One set of tests run on Travis. These tests validate the METADATA entries them…

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## [To ~~not~~ shell out](https://discourse.julialang.org/t/to-not-shell-out/8929)

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**Author:** [@yakir12](https://discourse.julialang.org/u/yakir12)\
**Replies:** 14\
**Last updated:** [February 9, 2018, 2:02pm UTC](https://discourse.julialang.org/t/to-not-shell-out/8929 "2018-02-09T14:02:05Z")

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Related to this topic, I’d like to read the modification time in the metadata of images. Right now I can do this by “shelling out” and using exiftool. While this works, it’s painfully slow (when I need to process hundred…