MetaData is sexy!

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# MetaData is sexy!
## ⚔<br/>
### Rainer M Krug
### University Zurich, IEEU
### 18.06.2019 (updated: 2019-06-18)

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# MetaData

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.dt[ [icanbareleydraw](http://www.icanbarelydraw.com/comic/wp-content/uploads/2013/06/metadata-1200dpi.png) ]
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# Data about Data
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.dt[ [randylane](http://randylane.com/wp-content/uploads/2014/09/5141328136_16d8f73ee7_b.jpg) ]

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.dt[ [istockphoto](https://media.istockphoto.com/photos/woman-scientist-screaming-picture-id616093188?k=6&m=616093188&s=612x612&w=0&h=1nrZy_8hdnd0BxG1_q60kBbFYmCrrPkyDe_LvKurKjU=) ]

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Change to MetaData in your mind

.dt[ [nomorewallstreet](http://nomorewallstreet.com/wp-content/uploads/2014/10/taxes.jpg)]

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.dt[ [gobankingrates](https://cdn.gobankingrates.com/wp-content/uploads/2017/09/0-main-filing-taxes-romanr-shutterstock_583001296-848x477.jpg) ]

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Change to MetaData in your mind

.dt[ [nerdwallet](http://assets.nerdwallet.com/blog/wp-content/uploads/2015/10/8-student-faqs-about-taxes.jpg)  ]

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.dt[ [ogsl](https://ogsl.ca/sites/default/files/FAIR_EN.png)  ]

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.dt[ [edgefoscholars](https://edgeforscholars.org/wp-content/uploads/2017/04/happy-scientists.jpg)  ]
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# Metadata is complex and divers

.dt[ [randylane](http://randylane.com/wp-content/uploads/2014/09/5141328136_16d8f73ee7_b.jpg)]

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# Metadata is complex and divers
 ==> Metadata Schemes bring structure

==> Metadata Schemes are complex

.dt[ [oasis-open](http://docs.oasis-open.org/election/eml/v5.0/cs01/EML-Schema-Descriptions-v5.0_files/image028.gif)]

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# Introducing: Domain Specific Metadata Schemes (dmdScheme)

- Specific for requirements of domain

- Buy-in from scientists through **participation in development of the dmdScheme**

- Poisot et al., 2019: Metadata schemes for scientific domains, subdomains, research types, ...

Poisot, T., Bruneau, A., Gonzalez, A., Gravel, D., Peres-Neto, P., 2019. Ecological Data Should Not Be So Hard to Find and Reuse. Trends in Ecology & Evolution 0. https://doi.org/10.1016/j.tree.2019.04.005

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# Entering Metadata

.dt[ [gobankingrates](https://cdn.gobankingrates.com/wp-content/uploads/2017/09/0-main-filing-taxes-romanr-shutterstock_583001296-848x477.jpg)]

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# Data Format

- machine readable

- human readable

- XML

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# Introducing: R package dmdScheme

Entering Metadata in spreadsheet

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# Introducing: R package dmdScheme
Entering Metadata in spreadsheet

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# Introducing: R package dmdScheme

Validate Spreadsheet

```r
validate_report("SPREADSHEET.xlsx")
```

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# Introducing: R package dmdScheme
Validate Spreadsheet

```r
validate_report("SPREADSHEET.xlsx")
```
<img src="./fig/dmdScheme_validation_details.png" style="width= 100%" />

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# Introducing: R package dmdScheme

Export Spreadsheet to xml

```r
dmdScheme_to_xml( 
   read_from_excel("SPREADSHEET.xlsx"), 
   file = "metadata.xml" 
)
```

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# Competing or Not?

- Not!
- dmdSchemes are subsets of other schemes ([Darwin Core](http://rs.tdwg.org/dwc/), [Ecological Metadata Language ](https://knb.ecoinformatics.org/external/emlparser/docs/eml-2.1.1/index.html))

# Ontologies

.alert[ You don't want to go there! ]

.alert[ Not now! ]

.alert[ Trust me! ]

--
# Simply linking Metadata Properties

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