Developing fonts > Specifications

Developing OpenType Fonts
for Hebrew Script:

Appendix A: Writing System Tags

Features are encoded according to both a designated script and language system. The language system tag specifies a typographic convention associated with a language or linguistic subgroup. For example, there are different language systems defined for the Hebrew script; Hebrew, Judezmo, Yiddish, etc.

Currently, the Uniscribe engine only supports the "default" language for each script. However, font developers may want to build language specific features which are supported in other applications and will be supported in future Microsoft OpenType implementations.

*NOTE: It is strongly recommended to include the "dflt" language tag in all OpenType fonts because it defines the basic script handling for a font. The "dflt" language system is used as the default if no other language specific features are defined or if the application does not support that particular language. If the "dflt" tag is not present for the script being used, the font may not work in some applications.

The following tables list the registered tag names for scripts and language systems.

Registered tags for the Hebrew script Registered tags for Hebrew language systems
Script tag Script Language system tag Language
"hebr" Hebrew "dflt" *default script handling
"IWR " Hebrew
"JUD " Judezmo
"JII " Yiddish

Note: both the script and language tags are case sensitive (script tags should be lowercase, language tags are all caps) and must contain four characters (ie. you must add a space to the three character language tags).

Appendix B: VILNA.TTF (sample font)

The Guttman Vilna font will be distributed with Microsoft Visual OpenType Layout Tool (VOLT) and is provided under the terms of the VOLT supplemental files end user license agreement. It is provided for illustration only, and may not be altered or redistributed.

Guttman Vilna contains layout information and glyphs to support all of the required features for the languages supported in a Hebrew script. Each font should be designed as the font creator desires.

Some shaped glyph forms (such as ligatures) have no Unicode encoding. These glyphs have id's in the font, and applications can access these glyphs by "running" the layout features which depend on these glyphs. An application can also identify non-Unicode glyphs contained in the font by traversing the OpenType layout tables, or using the layout services for purely informational purposes.

Guttman Vilna contains three OpenType Layout tables: GSUB (glyph substitution), GPOS (glyph positioning), and GDEF (glyph definition, distinguishing base glyphs, ligatures, classes of mark glyphs, etc.).

Go to the VOLT community web site to download this sample font. Please be sure to read the end user license agreement that accompanies the download.

Appendix C: Suggested Glyphs

Hebrew has three cases where the METEG/SOF PASUQ is put between parts of a nikud. To allow correct display, it is suggested to add the following three glyphs to the font. The 'ccmp' feature can be used with a Lookup Type 4 to shape the ligated form. These glyphs do not need Unicode character values assigned.

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