Once you have saved your new lexicon, you will be automatically redirected to the Schema and View Editor where the structure of your lexicon is yet to be defined (you can also access it by following Switch To >Schema and View Editor or double-clicking on the lexicon while holding the Shift button).

The Schema Element Editor window consists of two frames. The left frame (called Lexicon structure) shows the default structure of your new lexicon that consists of two data containers: Form (with the Lexeme data category) and Sense. The right frame consists of two tabs: Schema element tab and View Editor tab. The Schema Element tab displays information on the selected element of the schema in the left frame. The information contains the name of the element, a description and specifies whether:

(1) the element is mandatory for lexical entries of the lexicon,

(2) multiples of this element are allowed.

In the View Editor tab you can create various views for your lexicon and the lexical entry display. As explained above, the structure of your new lexicon consists now only of two data containers and one data category. However, it will need to be extended according to the requirements of your lexicon. To add new elements, select e.g. Form and click on the icon below the left frame under the Lexicon Structure. A pop up window, New Schema Element, will appear in which you will be able to specify whether you wish to create a data container or data category. Mark data category and add a name and a description. After having done it, click OK. A new data category item will be created under Form (Figure 2.3).

In the same way you can create data containers in your lexicon. Following the simple folder - file analogy, it is possible to create data containers under other data containers (just like a simple folder-subfolder structure), but it is not allowed to create data categories under other data categories.

To modify an existing item in the structure, select the element in the lexicon structure, and see the Schema Element tab in the right frame. You can modify all the previously added information (i.e. Name, Description, Admin Info (i.e. any administrative info you might want to add) and whether the element should be mandatory or/and allow multiples). Moreover, you can also select a sort order for that given element and write a note. However, in LEXUS the application of the sort order for the structural elements should be done at the very end of the lexicon creation (see Section 1.3).

In case of data categories, you may decide to change from the user-defined type to the predefined data categories: either the Toolbox MDF categoriesor the ISO 12620 registry (ISOcat). For further information about ISOcat see the ISO Data Category Registry website. While changing to a Toolbox-defined data category is useful in those cases where you need maximum interoperability between the newly created lexicon and lexica in your workspace which were imported from the Toolbox application, changing to ISO 12620 data categories enhances interoperability and standardizes your lexicon to a wider accepted conceptual format.

(1) To change to Toolbox MDF categories, select a data category element in the lexicon structure in the left frame. In the right frame, under Registry click Toolbox MDF. Select the Toolbox data category from the list. Note that the description field will fill with information on the Toolbox element.

(2) To change to an ISO 12620 element, select a data category element in the lexicon structure in the left frame. In the right frame, under Type click 'ISO12620'. Fill in the name of the data category in the search box, select in which repositories you want to search and select one of the elements from the search results (see Figure 2.5). In this example we replace the user created data category by the ISOcat data category 'word'. A description of the data category is given in the search result list. For more detailed information on the data category a link to the ISOcat web site is given under the magnifier glass right of the search results.