# Metadata ### Data Objects Object Classes include: * Data files * Apps and Applets * Workflows * Jobs * Analyses * Records Each object receives their own unique ID * These can be file IDs or job IDs * These NEVER change * The same file can be uploaded multiple times into a project; different objects will be created. The platform DOES NOT overwrite a file. Instead, it creates a new file ID every time you upload it. * Metadata is essential to keep track of these files and their properties, since we cannot change the file ID. The data objects can have have 2 different items of custom metadata that can be added at any point. They are: * Tags: which are words to describe the file format, genome, etc. * Examples: fastq, control, bam, vcf * Properties: are key/ value pairs that can be used to describe the file * Examples: sample\_id, value= 001 ### Viewing Metadata Go to your project folder and find the file information. Identify the columns for the name, type/ class, and tags. You can do this in the overview of each, without selecting the file:

Or, you can do this by selecting each file individually to see a detailed view:

### Organization You can sort and organize data based on pre-established and custom metadata by selecting the “column” icon in the top right. Columns can also be sorted by hovering over the title. ### Filtering Metadata You can filer by the metadata present in the project space. The options are drop down menus above the overview of the metadata headings. ### Data Operations When viewing details of a particular data object, you will have a section for the data operations of a file. These include archive, copy, delete, and download. These operations will vary based on the access permission that you have for a given project. You can see the data operations available in the image below: