xz is a lossless data compression program and file format which incorporates the LZMA/LZMA2 compression algorithms. One can think of xz as a stripped-down version of the 7-Zip program. xz has its own file format rather than the .7z format used by 7-Zip (which lacks support for Unix-like file system metadata).
In general, an ePortfolio is a purposeful collection of information and digital artifacts that demonstrates development or evidences learning outcomes, skills or competencies.
Orthoses are widely used in the management of children with CP even though there is no robust evidence for its effect [8, 9]. The ankle-foot orthosis (AFO) is the most frequently used type of orthoses in the lower limb [10]. AFOs are designed to address two main concerns; either to improve function or to affect the body structure (i.e. to prevent or treat contractures).