Summary: TMX version 1.4 conformance to
Level 1, except that no markup is stripped.
All required header fields are supplied.
The adminlang field in the header is always English.
None of the optional header fields are supplied.
We assume that only two languages are used (source and single target
language).
No special consideration for segmentation.
Currently text is treated as plain text, in other words no markup like HTML
inside messages are stripped or interpreted as it should be for complete
Level 1 conformance.