Using character conversion to display non standard Unicode

Using character conversion to display non standard Unicode values Yoel Kortick Aleph Support Manager

Problem (from actual SI): • We would like to add a phonographic copyright symbol as a prefix to the display of the subfield 245$$p • We would need to use the Unicode U+2117 in edit_field. lng which is currently outside the available codes that can be used in this table. • This is being considered for use in MARC 21 in order to comply with RDA rules 2

Solution via configuration: 1. In $alephe_unicode we will make a table which will convert a specific character to the phonographic copyright symbol with unicode value 2117 2. We will then refer to this table in $alephe_unicode/tab_character_conversion_line with a unique identifier 3. We will then use this unique identifier in edit_field. eng 3

Step One • In $alephe_root/unicode directory create the following character conversion table yoelk@il-aleph 07(a 20_3): ~>cat $alephe_unicode/ yoel_to_unicode !!-!!-!!-!!-!!-!!!! !* The first column below should be the Hx column in http: //www. asciitable. com/ !* The second column below should be the value from http: // www. unicode. org/charts/ 22 2117 # ! will become sound recording copyright 21 263 A # " will become smiley face yoelk@il-aleph 07(a 20_3): ~> • This means that in table yoel_to_unicode the “ (quotation mark, Ascii value 22) becomes the phonographic copyright symbol (Unicode value 2117) • We could have used any symbol, we chose “ because it is not used often (as is a regular character like a, b, c, d etc. ) 4

Step Two • Now in tab_character_conversion_line we will make reference to the yoel_to_unicode table yoelk@il-aleph 07(a 20_3): ~>grep yoel_to_unicode $alephe_unicode/tab_character_conversion_line YOEL_TO_UTF ##### # line_sb 2 line_utf yoel_to_unicode yoelk@il-aleph 07(a 20_3): ~> • This means that character conversion YOEL_TO_UTF will use the values defined in table $alephe_unicode/yoel_to_unicode. 5

Step Three • Now in edit_field. eng we need to add the appropriate character conversion line before the phonographic copyright symbol (2117) so that will be converted from “ (21) • We also need to disable the character conversion after the “ is converted to the phonographic copyright symbol, otherwise every “ will become the phonographic copyright symbol. • Therefore in the line after the conversion of “ to phonographic copyright symbol we will use the default character conversion table which is 8859_1_to_UTF. 6

Step Three • For example, we created the following setup in edit_field. eng: Here we state the Z should 1 # 245## D B -6 convert to phonograph symbol 2 a A ^ 2 b A ^ Due to the character conversion line 2 c A ^ the “ will become a phonographic copyright symbol 2 h A ^ CHARACTER_CONVERSION=YOEL_TO_UTF 2 p A " CHARACTER_CONVERSION=8859_1_TO_UTF 1 # 245## 3 -6 2 # Here we state that the character conversion should return “back to normal” 7

Step Four • System number 85911 has field 24510$$p: 8

Step Five • In the full view of this record in web OPAC we can see this symbol is being added as a prefix. • The configuration effects web full view because it was done for identifier D in edit_field. eng 9

The Unicode Value in templates • It is also possible to add the Unicode value characters to cataloging templates • For example if we want to add the phonographic copyright symbol value to a cataloging template as a prefix to 245$$p we can add it as follows: Here we state the Z should convert to phonograph symbol 0821 L $$a 1001 L $$a $$d CHARACTER_CONVERSION=YOEL_TO_UTF 2451 L $$a $$b $$c $$h $$p" CHARACTER_CONVERSION=8859_1_TO_UTF 250 L $$a $$b Due to the character conversion line the “ will become a phonographic copyright symbol Here we state that the character conversion should return “back to normal” 10

The Unicode Value in templates • Here is the phonographic copyright symbol in the template using the special character conversion 11

Thank You Yoel. Kortick@exlibrisgroup. com