Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time

Materials Data Curation System

The NIST Materials Data Curation System (MDCS) provides a means for capturing, sharing, and transforming materials data into a structured format that is XML based amenable to transformation to other formats. The data are organized using user-selected templates encoded in XML Schema. These templates are used to create data entry forms. The documents are saved in a non-relational (NoSQL) database, namely MongoDB. The data can be searched and retrieved by a template-driven web-based form or by a RESTful API call. The system also enables the interconnection of MDCS repositories for federated searches.

The software was developed by the National Institute of Standards and Technology (NIST)


The XML-based schemas provided with the Materials Data Curator are examples of schemas that may be written to represent different aspects of materials data and to demonstrate some of the features that may be used within an XML schema (i.e. including tabular data or composition selection using the periodic table). The schemas do not represent “standard” metadata representations and are specifically release as “as is,” and as such NIST makes no warrant of any kind on the correctness or accuracy of the content of the schemas, nor the fitness of the schemas for any purpose and accepts any liability or responsibility for the consequences of the schemas use or misuse by anyone.

Note the Demo-Diffusion data schema is not meant as a metadata standard for diffusion data. It is just an example of how one might specify some of the metadata associated with typical tracer, intrinsic and chemical (interdiffusion) diffusivity experiments. This schema can be customized to fit the users’ needs. It should also be noted that while the Demo-Diffusion schema contains some instruments types (e.g Electron Probe Micro Analyzer or a microtome) not all the appropriate metadata for each instrument has been defined nor have all of the appropriate instrument types been defined.

Also note that not all XML-schemas will load properly within the Materials Data Curator.